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{{short description|Soy-based food used as a protein source}}
{{Infobox food
| name = Tofu
| image = Japanese SilkyTofu (Kinugoshi Tofu).JPG
| caption = A block of raw Japanese-style silken tofu
| alternate_name = Bean curd
| place_of_origin = [[China]]
| region = 
| associated_cuisine = {{Flatlist|
* [[East Asian cuisine]] & [[Southeast Asian cuisine]]
** [[Chinese cuisine|Chinese]]
** [[Japanese cuisine|Japanese]]
** [[Okinawan cuisine|Okinawan]]
** [[Korean cuisine|Korean]]
** [[Filipino cuisine|Filipino]]
** [[Indonesian cuisine|Indonesian]]
** [[Malaysian cuisine|Malaysian]]
** [[Singaporean cuisine|Singaporean]]
** [[Thai cuisine|Thai]]
** [[Vietnamese cuisine|Vietnamese]]
}}
| creator = 
| year = 
| mintime = 
| maxtime = 
| type = 
| course = 
| served = 
| main_ingredient = [[Soy milk]]
| minor_ingredient = 
| variations = 
| serving_size = 100 g
| calories = 
| protein = 
| fat = 
| carbohydrate = 
| glycemic_index = 
| similar_dish = 
| other = 
}}
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{{nihongo|'''Tofu'''|豆腐|Tōfu|lead=yes|extra={{Korean/auto|hangul=두부|rr=yes}}, {{lang-zh|c=豆腐|p=dòufu}}}} or '''bean curd''' is a food prepared by [[Coagulation (milk)|coagulating]] [[soy milk]] and then pressing the resulting [[curd]]s into solid white blocks of varying softness: ''silken'', ''soft'', ''firm'', and ''extra (or super) firm''. It originated in China and has been consumed in the country for over 2,000 years. Tofu is a traditional component of many [[East Asian cuisine|East Asian]] and [[Southeast Asian cuisine|Southeast Asian]] cuisines; in modern Western cooking, it is often used as a [[Meat alternative|meat substitute]].
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Nutritionally, tofu is low in [[calorie]]s, while containing a relatively large amount of [[protein]]. It is a high and reliable source of [[iron]], and can have a high [[calcium]] or [[magnesium]] content depending on the [[Flocculation|coagulants]] (e.g. [[calcium chloride]], [[calcium sulphate]], [[magnesium sulphate]]) used in manufacturing.
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Cultivation of tofu, as a protein-rich food source, has one of the lowest needs for land use (1.3 m²/ 1000 kcal) and emits some of the lowest amount of greenhouse gas emissions (1.6&nbsp;kg {{chem2|CO2}}/ 100 g protein).
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{{TOC limit|3}}
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== Etymology ==
The English word "tofu" comes from [[Japanese language|Japanese]] ''tōfu'' ({{lang|ja|豆腐}}). The Japanese ''tofu'', in turn, is a [[loanword|borrowing]] of [[Chinese language|Chinese]] {{lang|zh|豆腐}} ([[Standard Chinese|Mandarin]]: ''dòufǔ; tou4-fu'') 'bean curd, bean ferment'.
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The earliest documentation of the word in English is in the 1704 translation of [[Domingo Fernández Navarrete]]'s ''A Collection of Voyages and Travels'', that describes how tofu was made. The word ''towfu'' also appears in a 1770 letter from the English merchant [[James Flint (merchant)|James Flint]] to [[Benjamin Franklin]]. The term "bean curd(s)" for tofu has been used in the United States since at least 1840.
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== History ==
Tofu making was first recorded during the Chinese [[Han dynasty]] in 965 AD. Chinese legend ascribes its invention to Prince [[Liu An]] (179{{ndash}}122{{nbsp}}BC) of [[Anhui]] province. Tofu and its production technique were introduced to [[Japan]]  during the [[Nara period]] (710{{ndash}}794) but there are no clear records; tofu first appeared on record in 965 AD. Some scholars believe tofu arrived in [[Vietnam]] during the 10th and 11th centuries. It spread to other parts of [[Southeast Asia]] as well. This probably coincided with the spread of [[Buddhism]] as it is an important source of [[Protein (nutrient)|protein]] in the [[Buddhist cuisine|vegetarian diet of East Asian Buddhism]]. [[Li Shizhen]], during the [[Ming dynasty]], described a method of making tofu in the ''[[Compendium of Materia Medica]]''. Since then, tofu has become a [[Staple food|staple]] in many countries, including [[Vietnam]], [[Thailand]], and [[Korea]], with regional variations in production methods, texture, flavor, and usage.
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=== Theories of origin ===
The most commonly held of the three theories of tofu's origin maintains that tofu was discovered by [[Liu An]] (179–122 BC), a [[Han dynasty]] prince. While plausible, the paucity of reliable sources for this period makes this difficult to conclusively determine. In [[Chinese history]], important inventions were frequently attributed to important leaders and figures of the time. In 1960, a stone mural unearthed from an Eastern Han dynasty tomb provided support for the theory of the Han origin of tofu; however some scholars maintain that tofu during the Han dynasty was rudimentary and lacked the firmness and taste for it to be considered as tofu.
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Another theory suggests that the production method for tofu was discovered accidentally when a slurry of boiled, ground soybeans was mixed with impure [[sea salt]]. Such sea salt would probably have contained calcium and magnesium salts, allowing the soy mixture to curdle and produce a tofu-like gel.
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The last group of theories maintains that the ancient Chinese learned the method for curdling soy milk by emulating the milk curdling techniques of the [[Mongols|Mongolians]]. The primary evidence for this theory is the etymological similarity between the Chinese term ''rǔfǔ'' ({{lang|zh|乳腐}}), which literally means "milk curdled", used during [[Sui dynasty]] (AD 581–618), for dishes with a consistency like yogurt or soft cheese, later influenced by Mongolian milk products and methods of production, and the term ''dòufu'' ({{lang|zh|豆腐}}, "beans curdled" ) or tofu. Although intriguing and possible, there is no evidence to substantiate this theory beyond academic speculation.
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===East Asia===
====China====
{{See also|List of Chinese inventions}}
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A form of tofu may have been discovered during the [[Han dynasty]] (202&nbsp;BC{{snd}}AD 220), but it did not become a popular food in China until the [[Song dynasty]] (960–1279).
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In China, tofu was traditionally eaten at the graves of deceased relatives. Ghosts were said to have long since lost their chins and jaws, so only tofu was soft enough for them to eat. Before the advent of refrigeration in China, tofu was usually sold only in the winter because it did not spoil easily in cold weather. In the warmer months, once made, tofu would spoil if left for more than a day.
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====Japan====
[[File:TofuSeller1500.jpg|thumb|300px|Illustration of a tofu seller (right) and a ''[[sōmen]]'' seller (left) by [[Tosa Mitsunobu]], from the ''Songs of the Seventy-one Craftsmen'' (七十一番職人歌合 ''Shichijūichi-ban Shokunin [[Uta-awase]]''), a poetry anthology written around 1500]]
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Tofu was introduced to [[Japan]] by Zen Buddhist monks, who initially called it {{Nihongo|"Chinese curd"|唐符|tōfu}}. The earliest Japanese document concerning tofu refers to the dish being served as an offering at the [[Kasuga Shrine]] in [[Nara, Nara|Nara]] in 1183.
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The tofu that was introduced from China is thought to have originally been hard tofu such as island tofu from Okinawa, hard tofu from Hakusan City in Ishikawa Prefecture, Gokayama City in Toyama Prefecture, and Iya region in Tokushima Prefecture. A firm variation of tofu was introduced in [[Tosa Province]], today's [[Kōchi Prefecture|Kochi Prefecture]], by Mr. Park, the lord of Akizuki Castle and prisoner of war following the [[Japanese invasions of Korea (1592–1598)]] and he was given a town  and generous protection, and his family and subordinates ran many hard tofu shops and had a monopoly on them.  Gradually, production methods were devised to produce smooth tofu with a pleasant texture, and modern silken tofu was born. The book ''[[Tofu Hyakuchin]]'' ({{lang|ja|豆腐百珍}}), published in 1782 of the [[Edo period]], lists 100 recipes for cooking tofu.
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===Southeast Asia===
In Southeast Asia, tofu was introduced to the region by Chinese immigrants from [[Fujian|Fujian province]], as evidenced by many countries in Southeast Asia referring to tofu using the [[Min Nan]] Chinese word for either soft or firm tofu, or "tāu-hū" or "tāu-goa<sup>n</sup>" respectively. In [[Indonesia]], [[Malaysia]], [[Singapore]], [[Thailand]], [[Cambodia]], [[Myanmar]], the [[Philippine]]s and [[Vietnam]], tofu is widely available and used in many local dishes.
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Tofu is called ''tahu'' in Indonesia, and [[Indonesian cuisine|Indonesian dishes]] such as tahu sumbat, taugeh tahu, [[asinan]], [[siomay]] and some curries, often add slices of tofu. ''[[Tahu goreng]]'', ''tahu isi'' and ''[[tahu sumedang]]'' are popular fried tofu snacks.
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Tofu is called ''tauhu'' in Malaysia and Singapore. Malaysian and Singaporean Indians use tofu in their cuisine, such as in Indian ''[[mee goreng]]'', and ''[[rojak]]'' pasembor. [[Peranakan]] cuisine often uses tofu, as in Penang curry noodles and ''[[laksa]]''. Indonesia, Thailand, Malaysia, and the Philippines are major producers of tofu and have plants in many municipalities.
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Tofu in the [[Philippines]] is widely eaten as the breakfast snack ''[[taho|tahô]]'' (soft tofu, from [[Hokkien in the Philippines|Philippine Hokkien]] 豆腐 "tāu-hū"), or as ''tokwa'' (dry, firm tofu that is usually fried, from [[Hokkien in the Philippines|Philippine Hokkien]] 豆干 "tāu-goa<sup>n</sup>"), which is a staple alternative to meat in main meals and in numerous regional dishes. Tofu was introduced to the archipelago in the 10th to 13th centuries by [[Song dynasty]] Chinese mariners and merchants, along with many other foods that became staples of the Philippine diet. The use and production of tofu were first limited to urban centers with influential Chinese minorities, such as [[Cebu City|Cebu]] or [[Kingdom of Tondo|Tondo]], but quickly spread to even remote native villages and islands.
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=== Elsewhere ===
[[Benjamin Franklin]] was the first American to mention tofu, in a 1770 letter to [[John Bartram]]. Franklin, who encountered it during a trip to London, included a few soybeans and referred to it as "cheese" from China. In 1770, Franklin also corresponded with [[James Flint (merchant)|James Flint]] on the subject of how the Chinese converted callivances (soybeans) into tofu. Flint's writing "Towfu" in his letter is the earliest documented use of "tofu" in the English language. The first tofu company in the United States was established in 1878. In 1908, [[Li Shizeng|Li Yuying]], a Chinese anarchist and a vegetarian with a French degree in agriculture and biology, opened a soy factory, the Usine de la [[Caséo-Sojaïne]]. This was the world's first soy dairy and the first factory in France to manufacture and sell beancurd.
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However, tofu was not well known to most Westerners before the middle of the 20th century, when it was popularized in the United States by [[William Shurtleff]] and [[Akiko Aoyagi]] (''The Book of Tofu'', 1975).
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== Production ==
{{multiple image

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 | caption_align     = center  
 | header            = Making tofu

 | image1            = Sun-dubu 5.jpg 
 | width1            = 
 | alt1              = 
 | thumbtime1        =
 | caption1          = Coagulated soy curds

 | image2            = Making tofu.jpg 
 | caption2          = Curds in a tofu [[mold (cooking implement)|mold]]
}}
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Regardless of the product or scale of the production, the production of tofu essentially consists of:
# The preparation of soy milk
# The coagulation of the soy milk to form curds ([[douhua]])
# The pressing of the soybean curds to form tofu cakes
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It is similar to the production of dairy [[cheese]] by coagulating the milk of dairy animals to form curds and pressing and aging the curds to form cheese. Typical tofu-making procedures are cleaning, soaking, grinding beans in water, filtering, boiling, coagulation, and pressing.
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[[wikt:coagulation|Coagulation]] of the protein and oil ([[emulsion]]) suspended in boiled soy milk is the most important step in the production of tofu. This process is accomplished with the aid of coagulants. Coagulation depends on complex interactions. There are many variables including the variety and percentage of protein in the soybeans used, slurry cooking temperature, coagulation temperature, and other factors.
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Soybean proteins are mainly composed of 7S and 11S proteins. The negative surface charges on these [[globulin]]s usually cause them to repel each other. Heating soy milk denatures the proteins and exposes hydrophobic groups normally oriented toward the inside of the globulin structure. Cations from coagulants bind the negatively charged groups. As the net charges of the protein molecules are neutralized, attractive [[Hydrophobic effect|hydrophobic interactions]] dominate over repulsive electrostatic charges, and [[protein aggregates]] are formed.
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Two types of coagulants (salts and acids) are used commercially.
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=== Salt coagulants ===
{{multiple image

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 | header            = Tofu tools

 | image1            = Tofu mould.jpg 
 | width1            = 
 | alt1              = 
 | thumbtime1        =
 | caption1          = ''Dubu-teul'' ('tofu mold') from [[Korea]]

 | image2            = Tofu knife.jpg 
 | caption2          = ''Dubu-kal'' ('tofu knife') from Korea
}}
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* '''[[Calcium sulfate]]''' ([[gypsum]]) ({{lang-zh|links=no|c=石膏|p=shígāo}}) – the traditional and most widely used coagulant to produce Chinese-style tofu, it produces a tofu that is tender but slightly brittle in texture. The coagulant itself is tasteless. Also known as gypsum, calcium sulfate is quarried from geological deposits, and no chemical processing or refining is needed, making it the cheapest coagulant used in tofu production. When used in production, the coagulation reaction is slower due to its low solubility, forming a smooth, more gelatinous tofu with relatively high water content and soft texture. Use of this coagulant also makes tofu that is rich in [[calcium#Nutrition|calcium]]. As such, many tofu manufacturers choose to use this coagulant to be able to market their tofu as a good source of dietary calcium.
* '''Chloride-type nigari salts''' or '''lushui''' (Traditional: 鹵水, 滷水; Simplified: 卤水; Pinyin: lǔshuǐ) – [[Magnesium chloride]] and [[calcium chloride]]: Both of these salts are highly soluble in water and affect soy protein in the same way, whereas [[gypsum]] is only very slightly soluble in water and acts differently in soy protein precipitation, the basis of tofu formation. These are the coagulants used to make tofu with a smooth and tender texture. In Japan, a white powder called ''[[nigari]]'', which consists primarily of [[magnesium chloride]], is produced from [[Sea water|seawater]] after the [[sodium chloride]] is removed and the water evaporated. Depending on its production method, ''nigari/Lushui'' may also contain small quantities of [[magnesium sulfate]] (Epsom salt), [[potassium chloride]], calcium chloride, and trace amounts of other naturally occurring salts. Although the term ''nigari'' is derived from ''nigai'', the Japanese word for "bitter", neither ''nigari'' nor pure magnesium chloride imparts a perceivable taste to the finished tofu. Calcium chloride is not found in seawater in significant quantities and therefore is not regarded as ''nigari''. It is used extensively in the United States due to its flavor and low cost. Fresh clean seawater itself can also be used as a coagulant.
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=== Acid coagulants ===
* '''[[Glucono delta-lactone]]''' (GDL): A naturally occurring organic acid also used in [[cheesemaking]], this coagulant produces a very fine textured tofu that is almost jelly-like. It is used especially for "silken" and softer tofus and confers a faint sour taste to the finished product. GDL is derived from glucose and takes the form of a white powder at room temperature. Its molecular structure contains a six-membered [[Heterocyclic compound|heterocyclic]] ring that is hydrolyzed upon contact with water, slowly converting GDL to gluconic acid. forming a single, smooth gel that is free of air gaps and that resists breaking during transportation. Using GDL as a coagulant, silken tofu can be formed directly in its container, as it does not require pressing. This acid coagulant is also commonly used together with calcium sulfate to give soft tofu a smooth, tender texture.
* Other edible acids: Though they can affect the taste of the tofu more, and vary in density and texture, acids such as [[acetic acid]] ([[vinegar]]) and [[citric acid]] (such as lemon juice), can also be used to coagulate soy milk and produce tofu.
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=== Enzyme coagulants ===
* Among [[enzymes]] that have been shown to produce tofu are [[papain]], and alkaline and neutral [[protease]]s from microorganisms. Papain, moreover, has been studied as a gelling agent to produce "instant tofu" from soy protein isolate and soy glycinin (11S) protein.
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Contemporary tofu manufacturers may choose to use one or more of these coagulants since each plays a role in producing the desired texture in the finished tofu. Different textures result from different pore sizes and other microscopic features in the tofu produced using each coagulant. The coagulant mixture is dissolved in water, and the solution is then stirred into boiled soy milk until the mixture curdles into a soft [[gel]].
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Coagulants are typically added at concentrations between 1.5 and 5.0 g/kg. In all coagulants consisting of calcium or magnesium salts, the positive double-bonded ions of the calcium or magnesium are responsible for the coagulation of the soy proteins which become part of the tofu, thereby enhancing its nutritional value. Only 1 part per 1000 of the tofu eaten is coagulant; most of the coagulant reacts with soy protein and is broken down into ions. The non-reactive portion dissolves in the [[soy whey]] and is discarded.
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The curds are processed differently depending on the form of tofu that is being manufactured. For soft silken tofu ({{lang|zh|[[wikt:嫩|嫩]][[wikt:豆|豆]][[wikt:腐|腐]]}}; ''nèndòufu'' in Chinese or {{lang|ja|絹漉し豆腐}} ''kinugoshi-dōfu'' in Japanese) or tofu pudding ({{lang|zh|[[wikt:豆|豆]][[wikt:花|花]]}}, ''dòuhuā'' or 豆腐花, ''dòufuhuā'' in Chinese, or {{lang|ja|おぼろ豆腐}} ''Oboro-dōfu'' in Japanese) the soy milk is curdled directly in the tofu's final packaging. For standard firm East Asian tofu, the soy curd is cut and strained of excess liquid using [[cheesecloth]] or [[muslin]] and then lightly pressed to produce a soft cake. Firmer tofus, such as East Asian dry tofu ({{lang|zh|[[wikt:豆|豆]][[wikt:干|干]]}} in Chinese or {{lang|ja|凍み豆腐}} ''Shimi-dōfu'' in Japanese) or Western types of tofu, are further pressed to remove even more liquid. In Vietnam, the curd is strained and molded in a square mold, and the end product is called ''đậu khuôn'' (molded bean) or ''đậu phụ'' (one of the Vietnamese ways to pronounce the Chinese ''dòufu''). The tofu curds are allowed to cool and become firm. The finished tofu can then be cut into pieces, flavored or further processed.
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Although tartness is sometimes desired in dessert tofu, the acid used in flavoring is usually not the primary coagulant, since concentrations sufficiently high to induce coagulation negatively affect the flavor or texture of the resulting tofu. A sour taste in tofu and a slight cloudiness in its storing liquid is also usually an indication of bacterial growth and, hence, spoilage.
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=== Colour ===
The whiteness of tofu is ultimately determined by the soybean variety, soybean protein composition, and degree of aggregation of the tofu gel network. The yellowish-beige color of soybeans is due to the color compounds including anthocyanin, isoflavones, and polyphenol compounds; therefore the soybean variety used will predicate the color of the final tofu product. Ways to reduce the yellow color include reducing isoflavone content by changing the pH of the soy milk solution used in the production of the tofu so that the relevant compounds precipitate out and are removed during the extraction of okara. The opacity of tofu gel and the off-white color typical of standard uncooked firm tofu is due to the scattering of light by the colloidal particles of the tofu. The addition of higher levels of calcium salts or a high protein content will contribute to forming a denser and more aggregated gel network which disperses more light, resulting in tofu with a whiter appearance.
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=== Flavor ===
{{See also|Soy odor}}
Tofu flavor is generally described as bland, which is the taste desired by customers in North America. A more beany flavor is preferred in East Asia. The beany or bland taste is generated during the grinding and cooking process, and either a "hot grind" or a "cold grind" can be used to influence the taste. The hot grind method reduces the beany flavor by inactivating the [[lipoxygenase]] enzyme in the soy protein that is known to generate off flavors. Eliminating these flavors makes tofu that is "bland".  If a cold grind is used lipoxygenase remains and produces the aldehyde, alcohol, and ester volatile compounds that create beany notes.
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== Varieties ==
A wide variety of types and flavors of tofu is available in both Western and Eastern markets. Despite the range of options, tofu products can be split into two main categories: 'fresh tofu', which is produced directly from soy milk, and 'processed tofu', which is produced from fresh tofu. Tofu production also creates important by-products that are used in various cuisines.
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=== Unpressed fresh===
Unpressed fresh tofu is gelled soy milk with curd that has not been cut and pressed of its liquid. Depending on whether the soy milk is gelled with [[bittern (salt)|bittern]] ([[magnesium chloride]]) solution or a suspension of gypsum ([[calcium sulphate]]), different types of unpressed tofu are produced. Gypsum-gelled soft tofu has a smooth and gel-like texture and is commonly known as soft tofu, silken-tofu, or [[douhua]] ({{lang|zh|豆花}}). The bittern-gelled variety has a very soft spongy curdled texture and is known as extra-soft or ''sun-dubu'' ({{lang|ko|순두부}}).
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Unpressed tofu is so soft that it is directly ladled out for serving or sold with its gelling container.
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==== Extra soft ====
[[File:Sun-dubu.jpg|thumb|left|''Sun-dubu'' (extra soft tofu)]]
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Unpressed [[bittern (salt)|bittern]]-gelled soft tofu is called ''sun-dubu'' ({{lang|ko|순두부}}; "mild tofu") in [[Korean language|Korean]]. Soy milk is mixed with [[seawater]], or [[saline water]] made with [[Korean sea salt|sea salt]], so that it curdles. The curds remain loose and soft. Freshly made ''sun-dubu'' is eaten boiled with little or no seasoning. Manufactured ''sundubu'' is usually sold in tubes. It is also the main ingredient in ''[[sundubu-jjigae]]'' ({{lang|ko|순두부찌개}}; "soft tofu stew").
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Although the word ''sun'' in ''sun-dubu'' does not have a [[Sino-Korean vocabulary|Sino-Korean origin]], ''sun-dubu'' is often translated into Chinese and Japanese using the Chinese character {{linktext|純}}, whose Korean pronunciation is ''sun'' and the meaning is "pure". Thus in China, ''sun-dubu'' is called ''chún dòufu'' ({{lang|zh|純豆腐}}; "pure tofu"), and in Japan, it is called ''jun-tōfu'' ({{lang|ja|純豆腐}}) or ''sundubu'' ({{lang|ja|スンドゥブ}}).
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==== Soft ====
[[File:Soft tofu 2.jpg|thumb|left|Soft tofu]]
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Soft tofu, also known as "silken tofu", is called ''nèndòufu'' ({{lang|zh|嫩豆腐}}; "soft tofu") or ''huádòufu'' ({{lang|zh|滑豆腐}}, "smooth tofu") in [[Chinese language|Chinese]]; ''kinugoshi-dōfu'' ({{lang|ja|絹漉し豆腐}}; "silk-filtered tofu") in [[Japanese language|Japanese]]; and ''yeon-dubu'' ({{Korean|hangul=연두부|hanja=軟豆腐}}; "soft tofu") in [[Korean language|Korean]]. Gelled with gypsum, this tofu is undrained, and unpressed, and contains a high moisture content. Silken tofu is produced by coagulating [[soy milk]] without cutting the curd. Silken tofu is available in several consistencies, including soft and firm, but all silken tofu is more delicate than regular [[#Firm|firm tofu]] (pressed tofu) and it has different culinary uses. Silken tofu can be used as a substitute for dairy products and eggs, especially for [[smoothies]] and baked desserts.
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''[[Douhua]]'' ({{lang|zh|豆花}}, also known as {{lang|zh|豆腐花}}, ''dòufuhuā'' in Chinese), or ''tofu brain'' ({{lang|zh|豆腐腦}} or {{lang|zh|豆腐脑}}, ''dòufunǎo'' in Chinese) or ''dau fa'' (Cantonese) and ''tau hua'' (Fujianese) ({{lang|zh|豆花}}; "bean flower") is similar to silken tofu, but is typically served a few hours after it is prepared. It is most often eaten as a hot dessert, but sometimes salty pickles or hot sauce are added. This is a type of soft tofu with very high moisture content. Because using [[chopsticks]] make ''douhua'' difficult to pick up, it is generally eaten with a spoon. With the addition of flavorings such as finely chopped [[spring onions]], dried [[shrimp]], [[soy sauce]], or [[chilli sauce]], ''douhua'' is a popular breakfast dish across China. In Malaysia, ''douhua'' is usually served warm with white or dark palm sugar syrup, or served cold with [[longan]]s.  It is frequently served at breakfast or for dessert. It is usually served either with a sweet ginger syrup, or a mushroom gravy called ''da lu'' ({{lang|zh|打卤}}). It's normally coagulated at the restaurant into a serving container. Douhua is not always considered a type of tofu, but rather a type of food in its own right.
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Some variation exists among soft tofus. Black douhua ({{lang|zh|黑豆花}}, hēidòuhuā) is a type of silken tofu made from black soybeans, which is usually made into ''dòuhuā'' ({{lang|zh|[[wikt:豆|豆]][[wikt:花|花]]}}) rather than firm or dry tofu. The texture of black bean tofu is slightly more gelatinous than regular ''douhua'' and the color is greyish in tone. This type of tofu is eaten for its earthy "black bean taste". ''Edamame tofu'' is a Japanese variety of ''kinugoshi tōfu'' made from ''edamame'' (fresh green soybeans); it is pale green in color and often studded with whole ''edamame''.
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=== Pressed fresh ===
Depending on the amount of water that is extracted from the cut and pressed curds two types of tofu are produced: firm, and extra firm. Fresh tofu is usually sold completely immersed in water to maintain its moisture content and freshness, and to suppress bacterial growth.
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==== Firm ====
[[File:Tofu 4.jpg|thumb|left|Firm tofu]]
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Firm tofu (called {{lang|zh|老豆腐}} ''lǎodòufu'' in Chinese; {{lang|ja|木綿豆腐}}, ''momen-dōfu'' in Japanese, "cotton tofu"; {{lang|ko|모두부}}, ''mo-dubu'' in Korean): Although drained and pressed, this form of fresh tofu retains a high moisture content. It has the firmness of raw meat and bounces back readily when pressed. The texture of the inside of the tofu is similar to that of a firm custard. The skin of this form of tofu retains the pattern of the muslin used to drain it, and the outside is slightly more resistant to damage than the inside. It can be picked up easily with chopsticks.
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A very firm type of ''momen-dōfu'' is eaten in parts of Japan, called ''ishi-dōfu'' (石豆腐, "stone tofu") in parts of [[Ishikawa Prefecture|Ishikawa]], or ''iwa-dōfu'' (岩豆腐, "rock tofu") in [[Gokayama]] in the [[Toyama Prefecture]] and in [[Iya Valley|Iya]] in the prefecture of [[Tokushima]]. These types of firm tofu are produced with seawater instead of ''[[nigari]]'' ([[magnesium chloride]]), or using concentrated [[soy milk]]. Some of them are squeezed using heavy weights to eliminate excess moisture. These products are produced in areas where traveling is inconvenient, such as remote islands, mountain villages, and heavy snowfall areas.
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==== Extra-firm ====
{{main|Dougan}}
[[File:DouFu Gan.JPG|thumb|left|''Dòugān'' (extra firm tofu)]]
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''Dòugān'' ({{lang|zh|豆干}}, literally "dry tofu" in Chinese) is an extra firm variety of tofu where a large proportion of the liquid has been pressed out. ''Dòugān'' contains the least moisture of all fresh tofu, the firmness of fully cooked meat, and a somewhat rubbery feel similar to that of [[paneer]]. It is not easily crumbled except when it's sliced thinly. Some varieties of ''dougan'' has the pattern of the muslin used to drain and press it.
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One way to cook ''dougan'' is to cut it into thin slices called shredded dried tofu ({{lang|zh|豆干絲}}, ''dòugānsī'' in Chinese, or simply {{lang|zh|干絲}}, ''gānsī''). The strings look like loose cooked [[noodle]]s and can be served cold, stir-fried, or added to soup, as with Japanese ''[[aburaage]]''.
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[[File:Thousand_leaves_tofu.jpg|thumb|''Baiye'']]
''Baiye'', ''qianzhang'', or ''gandoufu'' ({{lang|zh|百叶; 千张; 干豆腐}}) is a very flat (about 2&nbsp;mm thick) type of extra-firm tofu. It cannot be crumbled. The surface is filled with bulges arranged in a square grid from the muslin used to press it. It can be cut into long strings with a cross-section smaller than 2&nbsp;mm × 2&nbsp;mm and eaten in a way similar to ''gansi''. It is also used to make：
* ''Su ji'' ({{lang|zh|素鸡}}, "vegetarian chicken"), either by being rolled up or by being pressed together and fried.
* ''Baiye jie'' ({{lang|zh|百叶结}} "''baiye'' knots"), by slicing into 2&nbsp;cm × 10&nbsp;cm slices and tying the slice up.
* Various dishes that roll other food items inside a piece of ''baiye''.
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=== Processed tofu ===
Many forms of processed tofu exist. Some processing techniques probably  originate before the days of refrigeration from the need to preserve tofu or to increase its shelf life. Other production techniques are employed to create tofus with different textures and flavors.
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==== Fermented ====
[[File:Fermentedchilibeancurd.jpg|thumb|Pickled tofu]]
* '''[[Pickled tofu]]''' ({{lang|zh|[[wikt:豆|豆]][[wikt:腐|腐]][[wikt:乳|乳]]}} in Chinese, [[pinyin]]: ''dòufurǔ'', or {{lang|zh|[[wikt:腐|腐]][[wikt:乳|乳]]}} fŭrŭ; ''chao'' in Vietnamese), also called "preserved tofu" or "fermented tofu", consists of cubes of dried tofu that have been allowed to fully air-dry under hay and slowly ferment with the help of aerial bacteria. The dry fermented tofu is then soaked in salt water, Chinese [[rice wine]], vinegar or minced [[chile pepper|chiles]], or in a mixture of whole rice, bean paste, and soybeans. In the case of red pickled tofu ({{lang|zh|[[wikt:紅|紅]][[wikt:豆|豆]][[wikt:腐|腐]][[wikt:乳|乳]]}} in Chinese, Pinyin: ''hóng dòufurǔ''), [[red yeast rice]] (cultivated with ''[[Monascus purpureus]]'') is added for color. In Japan, pickled tofu with miso paste is called ''tofu no misodzuke'', and is a traditional preserved food in [[Kumamoto]]. In [[Okinawa Island|Okinawa]], pickled and fermented tofu is called ''tofuyo'' (豆腐餻). It is made from ''Shima-doufu'' (an Okinawan variety of large and firm tofu). It is fermented and matured with koji mold, red koji mold, and [[awamori]].
* '''[[Stinky tofu]]''' ({{lang|zh|[[wikt:臭|臭]][[wikt:豆|豆]][[wikt:腐|腐]]}} in Chinese, Pinyin: ''chòudòufu'') is soft tofu that has been fermented in a vegetable and fish brine. The blocks of tofu have a pungent cheese smell, sometimes resembling rotting food. Despite its strong odor, the flavor and texture of stinky tofu is appreciated by aficionados, who describe it as delightful. The texture of this tofu is similar to the soft East Asian tofu from which it is made. The rind that stinky tofu develops when fried is said to be best when especially crisp, and fried stinky tofu is usually served with [[soy sauce]], sweet sauce, or hot sauce.
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==== Frozen ====
[[File:Dong Dou Fu (tofu).jpg|thumb|Thawed and sliced frozen tofu]]
[[File:Koya-dofu (2012.07.31).jpg|thumb|[[Koya-dofu]] after soaking in water]]
; Frozen tofu (凍豆腐 ''dòngdòufu'', 冰豆腐 ''bīngdòufu'' in Chinese, both meaning "frozen tofu")
: A frozen tofu. The ice crystals that develop within it result in the formation of large cavities that appear to be layered. Frozen tofu takes on a yellowish hue in the freezing process. Frozen tofu originates in the [[Jiangnan|Jiangnan region]] of China and is commonly made at home from soft tofu. It is also commercially sold as a specialty in Hong Kong, Taiwan, and other areas with Jiangnan emigrants. It is regularly paired with ''[[tatsoi]]'' as a winter dish. Frozen tofu is defrosted before serving and sometimes pressed to remove moisture prior to use.
: During freezing, the ice crystals puncture cell walls and facilitate the release of free and bound water and cause a decrease in total water content in tofu after freezing then thawing. The initial protein-water bonds are irreversibly replaced by protein-protein bonds, which are more elastic and cause a structural change to the gel network and lead to an increase in textural properties such as hardness, springiness, cohesiveness, and gumminess.
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In Japan, two kinds of freeze-dried tofu are produced. Those are usually rehydrated by being soaked in water prior to consumption. In their [[Dehydrated food|dehydrated]] state, they do not require refrigeration.
* '''Koya-dofu''' ('''kōya-dōfu''', 高野豆腐 in Japanese) is a  [[Freeze-drying#Food industry|freeze-dried]] type also known as '''kori tofu''' (凍り豆腐, literally "frozen tofu"). Originally from [[Mount Kōya]], a center of [[Japanese Buddhism]] famed for its ''[[Buddhist cuisine|shōjin ryōri]]'', or traditional Buddhist vegetarian cuisine. It is said that the method of '''Koya-dofu''' was discovered by accident by leaving tofu outdoors in the winter season. It is sold in [[freeze drying|freeze-dried]] blocks or cubes in Japanese markets. It is typically simmered in ''[[dashi]]'', ''[[sake]]'' or ''[[mirin]]'' and [[soy sauce]]. In ''shōjin ryōri'', vegetarian ''kombu dashi'', made from seaweed, is used. When prepared in the usual manner, it has a spongy texture and a mildly sweet or savory flavor. The taste and flavor depend on what soup or cooking stock it was simmered in. A similar form of freeze-dried tofu, in smaller pieces, is found in instant soups (such as [[miso soup]]), in which the toppings are freeze-dried and stored in sealed pouches.
* '''Shimidofu''' (凍み豆腐) is mainly consumed in the Tohoku region. While Koya-dofu is made by shade-drying, shimidofu is made by sun-drying.
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=== By-products ===
==== Tofu skin ====
[[File:Tofu skin.jpg|thumb|Tofu skin]]
[[Tofu skin]] is produced when soy milk is boiled in an open, shallow pan, thus producing a film or skin composed primarily of a soy protein-lipid complex on the liquid surface. The films are collected and dried into yellowish sheets known as "soy milk skin" ({{lang|zh|腐皮}}, ''fǔpí'' in Chinese; {{lang|ja|湯葉}}, ''yuba'' in Japanese). Its approximate composition is 50–55% protein, 24–26% lipids (fat), 12% carbohydrate, 3% ash, and 9% moisture.
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The skin can also be dried into a product known as "tofu bamboo" ({{lang|zh|腐竹}}, ''fǔzhú'' in Chinese; ''phù trúc'' in Vietnamese; ''kusatake'', Japanese), or into many other shapes. Since tofu skin has a soft yet rubbery texture, it can be folded or shaped into different forms and cooked further to imitate meat in vegan cuisine. Some factories dedicate their production to tofu skin and other soy membrane products. Tofu skin is commonly sold in the form of dried leaves or sheets. Other people would put the "tofu bamboo" into congee (a watery rice mixture that is eaten for breakfast) so that the congee becomes more silky and smooth, and gives a whole new texture. Also, soft, fragile skin would be on the congee once it cools down. Tofu skin is cooked with noodles.
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==== Soy pulp ====
{{Main|Okara (food)}}
[[Okara (food)|Okara]], from the [[Japanese language|Japanese]] {{lang|ja|雪花菜(おから)}} is known as {{lang|zh|雪花菜}} ''xuěhuācài'', in [[Chinese language|Chinese]], lit. "snowflake vegetable"; {{lang|zh|豆腐渣}}, ''dòufuzhā'', also [[Chinese language|Chinese]], lit. "tofu sediment/residue"; and {{lang|ko|콩비지}}, ''kongbiji'', in [[Korean language|Korean]]).
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Sometimes known in the west as "soy pulp" or "tofu lees", ''okara'' is a tofu by-product consisting of the fiber, protein, and starch left over when soy milk has been extracted from ground soaked soybeans. It is often used as animal feed in most tofu-producing cultures, but also has other uses in Japanese and Korean cuisines, such as in the Korean stew ''kongbiji [[jjigae]]'' ({{lang|ko|콩비지찌개}}). It is also an ingredient for [[Veggie burger|vegetarian burgers]] in many Western nations. In [[Japan]], it is used to make [[ice cream]].
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=== Tofu-like foods ===
The term ''tofu'' is used by extension for similarly textured curdled dishes that do not use soy products, such as "almond tofu" ([[almond jelly]]), {{Interlanguage link|tamago dōfu{{!}}''tamago-dōfu''|2=ja|3=卵豆腐|preserve=1}} (egg), {{Interlanguage link|gomadōfu{{!}}''goma-dōfu''|2=ja|3=胡麻豆腐|preserve=1}} (sesame), or peanut tofu (Chinese {{lang|zh|落花生豆腐}} ''luòhuāshēng dòufu'' and [[Okinawan language|Okinawan]] {{Interlanguage link|jīmāmi-dōfu{{!}}''jīmāmi-dōfu''|2=ja|3=ジーマーミ豆腐|preserve=1}}).
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Due to their East Asian origins and their textures, many food items are called "tofu", even though their production processes are not technically similar. For instance, many sweet almond tofus are actually gelatinous desserts hardened using [[agar]] or [[gelatin]]. Some foods, such as Burmese tofu, are not coagulated from the "milk" of the legume but rather set in a manner similar to soft [[polenta]], [[Muk (food)|Korean muk]], or the [[jidou liangfen]] of [[Yunnan]] province of [[southwest China]].
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==== Almond tofu ====
"[[Annin tofu|Almond tofu]]" ({{lang-zh|links=no|c=杏仁豆腐}} ''xìngrén dòufu''; Japanese: ''annindōfu'') is a milky white and gelatinous substance resembling tofu, but it does not use soy products or soy milk and is hardened with [[agar]]. A similar dessert made with [[coconut milk]] or [[mango]] juices may occasionally be referred to as "coconut tofu" or "mango tofu", although such names are also given to hot dishes that use soy tofu and coconut or mango in the recipe.
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==== Chickpea tofu ====
{{Main|Burmese tofu}}
[[Burmese tofu]] (''to hpu'' in [[Burmese language|Burmese]]) is a legume product made from ''[[Gram flour|besan]]'' ([[Chickpea|''chana dal'']]) flour; the [[Shan people|Shan]] variety uses [[pigeon pea|yellow split pea]] flour instead. Both types are yellow in color and generally found only in [[Myanmar]], and Yunnan province of China, though the [[Bamar|Burman]] variety is also available in some overseas restaurants serving [[Cuisine of Myanmar|Burmese cuisine]]. The term is believed to be derived from Dou Fen (bean Jelly) from Chinese and it was adopted to Burmese cuisine through Shan people ( Dai people of Yunnan) . Burmese tofu may be fried as fritters cut into rectangular or triangular shapes.
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A variety called ''hsan to hpu'' (or ''hsan ta hpo'' in Shan regions) is made from rice flour (called ''hsan hmont'' or ''mont hmont'') and is white in color with the same consistency as yellow Burmese tofu when set. It is eaten as a salad in the same manner as yellow tofu.
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==== Egg tofu ====
{{Interlanguage link|Tamagodōfu{{!}}Egg tofu|2=ja|3=玉子豆腐|preserve=1}} (Japanese: {{lang|ja|玉子豆腐}}, {{lang|ja|卵豆腐}}, tamagodōfu) ({{lang-zh|links=no|c=蛋豆腐}}, dàndòufu; often called {{lang|zh|日本豆腐}}, Rìbĕn dòufu, lit. "Japan bean curd") is the main type of savory flavored tofu. Whole beaten eggs are combined with [[dashi]], poured into molds, and cooked in a steamer (cf. ''[[chawanmushi]]''). This tofu has a pale golden color that can be attributed to the addition of eggs and, occasionally, food coloring. This tofu has a fuller texture and flavor than silken tofu, due to the presence of egg fat and proteins. Plain "dried tofu" can be flavored by stewing in soy sauce ({{lang|zh|滷}}) to make soy-sauce tofu. It is common to see tofu sold from hot food stalls in this soy-sauce stewed form. Today Egg "Japanese" tofu is made of eggs, water, vegetable protein, and seasoning.
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Egg tofu was invented in Japan during the Edo period. The book《万宝料理秘密箱》written in 1785 recorded how to make Japanese tofu. Later the Japanese form of tofu entered Southeast Asia, being introduced to China in 1995 from Malaysia.
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100 grams of Egg tofu has 17&nbsp;mg calcium, 24&nbsp;mg magnesium, and 5&nbsp;grams protein while 100 grams tofu has 138&nbsp;mg calcium, 63&nbsp;mg magnesium and 12.2&nbsp;grams protein. Compared with tofu, Japanese tofu's nutritional value is lower.
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Tofu dishes common in Japan include three delicacies ({{lang|zh|三鲜}}) Japanese tofu; shrimp Japanese tofu; Japanese tofu in ketchup; ''teppanyaki'' Japanese tofu; and Japanese fish-flavored tofu.
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==== Peanut tofu ====
In Okinawa, Japan, {{Interlanguage link|jīmāmi-dōfu{{!}}''jīmāmi-dōfu''|2=ja|3=ジーマーミ豆腐|preserve=1}} a peanut milk, made by crushing raw peanuts, adding water and straining, is combined with starch (usually [[sweet potato]], known locally as ''umukuji'' or {{nihongo||芋澱粉|''umukashi''|}}) and heated until curdling occurs.
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The Chinese equivalent is {{lang|zh|落花生豆腐}} ''luòhuāshēng dòufu''.
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==== Sesame tofu ====
The tofu known as {{Interlanguage link|gomadōfu{{!}}''goma-dōfu''|2=ja|3=胡麻豆腐|preserve=1}} is made by grinding [[sesame]] into a smooth paste, combining it with liquid and [[kudzu]] starch, and heating it until curdling occurs. It is often served chilled as ''[[hiyayakko]]''.
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==== Thousand-layer tofu ====
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Thousand-layer tofu ({{lang-zh|t=千葉豆腐|s=千叶豆腐|p=qiānyè dòufu|l=thousand-layer tofu}}) is not a true tofu made by coagulation of soymilk, but a modern invention made from [[soy protein isolate]] and a source of starch. It has a smooth, bouncy texture somewhat comparable to [[kamaboko]]. Originally a Taiwanese invention called hundred-layer tofu (百葉豆腐), it was renamed in China to avoid confusion with the existing type of extra-firm tofu called ''baiye''.
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== Preparation ==
Tofu has very little flavor or smell of its own. Consequently, tofu can be used in both savory and sweet dishes, acting as a bland background for presenting the flavors of the other ingredients used. In order to flavor the tofu it is often marinated in soy sauce, chillis, sesame oil, etc.
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In East Asian cooking, tofu is prepared in many ways, including raw, stewed, stir-fried, in soup, cooked in sauce, or stuffed with fillings. The idea of using tofu as a meat substitute is not common in East Asia.
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===East Asia===
==== China ====
Many Chinese tofu dishes such as ''jiācháng dòufu'' (家常豆腐) and ''[[Mapo doufu|mápó dòufu]]'' (麻婆豆腐) may include meat.
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In [[Chinese cuisine]], ''[[Douhua|Dòuhuā]]'' ({{lang|zh|[[wikt:豆|豆]][[wikt:花|花]]}}) is served with toppings such as boiled [[peanut]]s, [[azuki bean]]s, cooked [[oatmeal]], [[tapioca]], [[mung bean]]s, or a syrup flavored with [[ginger]] or [[almond]]. During the summer, "dòuhuā" is served with crushed ice; in the winter, it is served warm.
In many parts of [[China]], fresh tofu is eaten with soy sauce or further flavored with ''[[katsuobushi]]'' shavings, [[century egg]]s ({{lang|ja|[[wikt:皮|皮]][[wikt:蛋|蛋]]}} pídàn), and [[sesame seed]] oil.
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With the exception of the softest tofus, all forms of tofu can be fried. Thin and soft varieties of tofu are [[Deep frying|deep fried]] in oil until they are light and airy in their core 豆泡 ''dòupào'', 豆腐泡 ''dòufupào'', 油豆腐 ''yóudòufu'', or 豆卜 ''dòubǔ'' in Chinese, literally "bean bubble", describing the shape of the fried tofu as a bubble.
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Depending on the type of tofu used, the texture of deep-fried tofu may range from crispy on the outside and custardy on the inside, to puff up like a [[Youtiao|plain doughnut]]. The former is usually eaten plain in Chinese cuisine with garlic soy sauce, while the latter is either stuffed with [[surimi|fish paste]] to make ''[[Yong Tau Foo]]'' or cooked in soups. In [[Taiwan]], fried tofu is made into a dish called "[[A-gei]]", which consists of a fried aburage tofu package stuffed with noodles and capped with [[surimi]].
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Tofus such as firm East Asian and ''dòugān'' (Chinese dry tofu), with their lower moisture content, are cut into bite-sized cubes or triangles and deep fried until they develop a golden-brown, crispy surface ([[wikt:炸|炸]][[wikt:豆腐|豆腐]] in Chinese, ''zhádòufu'', lit. "fried tofu"). These may be eaten on their own or with a light sauce, or further cooked in liquids; they are also added to hot pot dishes or included as part of the vegetarian dish called ''[[Buddha's delight|luohan zhai]]''.
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A spicy [[Szechuan cuisine|Sichuan]] preparation using firm East Asian tofu is ''[[mapo tofu|mápó dòufu]]'' ({{lang|zh|麻婆豆腐}}). It involves braised tofu in a [[beef]], chili, and fermented bean paste sauce. A vegetarian version is known as ''málà dòufu'' ({{lang|zh|麻辣豆腐}}).
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Dried tofu is usually not eaten raw but first stewed in a mixture of soy sauce and spices. Some types of dried tofu are pre-seasoned with special blends of spices, so that the tofu may either be called "five-spice tofu" ({{lang|zh|五香豆腐}} ''wǔxiāng dòufu'') or "soy sauce stewed tofu" ({{lang|zh|鹵水豆腐}} ''lǔshuǐ dòufu''). Dried tofu is typically served thinly sliced with chopped [[Scallion|green onions]] or with slices of meat for added flavor.
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Tofu bamboos are often used in [[Lamb (meat)|lamb]] stew or in a [[dessert]] [[soup]]. Tofu skins are often used as wrappers in [[dim sum]]. Freeze-dried tofu and frozen tofu are rehydrated and enjoyed in savory soups. These products are often taken along on camping trips since a small bag of them can provide protein for many days.
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Pickled tofu is commonly used in small amounts together with its soaking liquid to flavor stir-fried or braised [[vegetable]] dishes (particularly [[leaf vegetable|leafy green vegetables]] such as [[Ipomoea aquatica|water spinach]]). It is often eaten directly as a [[condiment]] with rice or [[Rice congee|congee]].
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<gallery>
File:Pidan doufu by fortes in Beijing.jpg|Chinese soft tofu dish, ''[[pidan doufu]]''
File:豆腐丝2 (2).JPG|Prepared dried tofu threads ({{lang|zh|干絲}}, ''gānsī'')
File:Doufuru.JPG|Chòudòufu is a very pungent type of tofu.
File:Stinky Tofu Mala.jpg|[[Sichuan mala|''Sichuan-style'']] ''(málà chòudòufu)'' numbing spicy [[stinky tofu]]
File:Tufo and potatoes grilled.jpg|Tofu and potatoes grilled at a street stall in [[Yuanyang County, Yunnan|Yuanyang]], Yunnan province, China
File:Dofuhua-lamma.jpg|''[[Douhua]]'' ({{lang|zh|豆花}}), is a soft tofu dish.  The fresh tofu is served warm and dressed with sweet syrup.
File:Sichaun-style tofu by Meji (9157749159).jpg|A dish prepared from Sichuan-style tofu
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==== Japan ====
[[File:Friends from Japan (367151754).jpg|thumb|Tofu varieties sold at a shop]]
In [[Japan]], a common lunch in the summer months is ''[[hiyayakko]]'' ({{lang|ja|[[wikt:冷|冷]][[wikt:奴|奴]]}}), silken or firm East Asian tofu served with freshly grated [[ginger]], [[scallion|green onions]], or ''[[katsuobushi]]'' shavings with [[soy sauce]]. In the winter, tofu is frequently eaten as ''yudofu'', which is simmered in a clay pot in ''[[kombu]] [[dashi]]'', with vegetables such as [[Chinese cabbage]] or green onion.
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Deep fried tofu is called ''[[atsuage]]'' (厚揚げ) or ''namaage'' (生揚げ) in Japan. The thinner variety called ''[[aburaage]]'' (油揚げ), develops a tofu pouch often used for ''[[Sushi#Inarizushi|inarizushi]]''.
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In Japan, cubes of lightly coated and fried tofu topped with a ''[[kombu]] [[dashi]]''-based sauce are called ''[[agedashi dōfu]]'' ({{lang|ja|揚げ出し豆腐}}). Soft tofu that has been thinly sliced and deep fried, known as ''aburage'' in Japan, is commonly [[blanching (cooking)|blanched]], seasoned with [[soy sauce]] and [[mirin]] and served in dishes such as ''[[kitsune]] [[udon]]''.
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In [[Gifu Prefecture]], there is a local specialty called ''komo-dofu'', which consists of tofu that has been wrapped in a ''komo'', or mat of woven straw, which leaves its imprint on the exterior. The wrapped tofu is then boiled in soup stock. Voids within the tofu develop during the boiling process, allowing the soup stock flavor to penetrate and giving it a distinctive porous appearance.
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Soft tofu can also be broken up or mashed and mixed with raw ingredients prior to being cooked. For example, Japanese ''[[ganmodoki]]'' is a mixture of chopped vegetables and mashed tofu. The mixture is bound together with starch and deep-fried. Chinese families sometimes make a steamed [[meatloaf]] or [[meatball]] dish from equal parts of coarsely mashed tofu and ground pork.
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Japanese [[miso soup]] is frequently made with tofu.
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File:TofuWithSoySauceAndCarrot.jpg|Japanese-style silken tofu with soy sauce and a decorative carrot slice
File:Atsuage.jpg|''[[Aburaage|Atsuage]]'', thick fried tofu
File:Goma tofu by sunday driver in Kyoto.jpg|''Goma tofu'', made from sesame seeds and kudzu starch
File:Yudōfu 001.jpg|''Yudofu'', or tofu in hot water
File:Toyokawa inari-zushi (2010.11.07).jpg|''[[Sushi#Inarizushi|Inarizushi]]'', tofu skin with various fillings
File:Tofu in miso soup by cathykid in Taipei.jpg|Tofu in [[miso soup|''miso'' soup]]
File:Ganmodoki.jpg|''[[Ganmodoki]]'' ({{lang|ja|がんもどき}})
File:Komo-dofu on sale. Author's own photograph taken 2004-11-22. Freely Licensed.jpg| Local specialty ''komo-dofu'' on sale in a market in [[Takayama, Gifu|Takayama]]
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==== South Korea ====
''Dubu'' plays an important part in [[Korean cuisine]]. It is also used in many soups. Cubes of firm tofu can be seasoned with soy sauce, garlic, and other ingredients before pan-frying. A dish of tofu cubes simmered with similar spicy seasoning is called ''dubu-[[jorim]]''. ''[[Dubu-kimchi]]'' features blanched tofu served in rectangular slices around the edges of a plate with pan-fried ''[[kimchi]]''. This is a popular food to accompany alcoholic drinks (''[[Anju (food)|anju]]''). Soft, unpressed ''sun-dubu'' is used as the main ingredient of ''[[sundubu-jjigae]]'' (soft tofu stew), while other soups and stews such as ''[[doenjang-guk]]'' (soybean paste soup), ''[[doenjang-jjigae]]'' (soybean paste stew), and ''[[kimchi-jjigae]]'' (kimchi stew) tend to have diced firm tofu in them. As in many other East Asian countries, tofu is also enjoyed in a hot pot dish called ''dubu-[[jeongol]]'' (tofu hot pot).
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File:Korean.food-Dubu.gui-01.jpg|Pan-fried tofu served with seasoned [[soy sauce]] for dipping
File:Dubu-kimchi.jpg|''[[Dubu-kimchi]]'' (blanched tofu served with stir-fried ''[[kimchi]]'')
File:Sundubu 2.jpg|Boiled ''sun-dubu'' (extra soft tofu) served in ''[[ttukbaegi]]''
File:Sundubu-jjigae 2.jpg|''[[Sundubu-jjigae]]'' (spicy soft tofu stew)
File:Dallae-doenjang-guk.jpg|''[[Allium monanthum|Dallae]]-[[doenjang-guk]]'' (soybean paste soup with wild chives and tofu)
File:KOCIS Dubu with soy sauce (4556150847).jpg|Chilled tofu served with soy sauce seasonings
File:Broccoli-dubu-muchim.jpg|Crumbled tofu and mashed broccoli salad
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===Southeast Asia===
====Indonesia====
In [[Indonesian cuisine|Indonesia]], tofu is called ''tahu'', a loanword from the [[Hokkien]] Chinese pronunciation of tofu (tāu-hū, 豆腐). In Indonesian markets, tofu is usually available in two forms: ''tahu putih'' or common white firm tofu; and ''tahu goreng'' or fried tofu that has developed a brown skin. ''Tahu yun yi'' or ''tahu Bandung'' is yellow tofu colored with [[turmeric]].
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A common cooking technique in many parts of East and Southeast Asia involves deep frying tofu in [[vegetable oil]], [[sunflower]] oil, or [[canola]] oil. In Indonesia, it is usually fried in [[palm oil]]. Although pre-fried tofu is often sold cold, it is seldom eaten directly and requires additional cooking.
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Popular Indonesian tofu dishes include ''[[tahu gejrot]]'' and ''[[kupat tahu]]''. ''Tahu gejrot'' is ''tahu pong'' type of hollow fried tofu cut into small pieces, served with a thin, watery dressing made by blending [[palm sugar]], vinegar, and [[Kecap manis|sweet soy sauce]], garnished with chili pepper, garlic, and shallot.  ''[[Kupat tahu]]'' is slices of tofu served with ''[[ketupat]]'' rice cake, usually in peanut sauce dressing. Slices of tofu are usually mixed in ''[[gado-gado]]'', ''[[ketoprak (dish)|ketoprak]]'' and ''[[siomay]]''.
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''Bacem'' is a method of cooking tofu originating in [[Central Java]]. The tofu is boiled in coconut water, mixed with ''lengkuas'' (galangal), Indonesian bay leaves, [[coriander]], [[shallot]], [[garlic]], [[tamarind]] and [[palm sugar]]. After the spicy coconut water has completely evaporated, the tofu is fried until it is golden brown. The result is moist but rather firm, sweet, and spicy tofu. This cooked tofu variant is commonly known as ''tahu bacem'' in [[Indonesian language|Indonesian]]. ''Tahu bacem'' is commonly prepared along with [[tempeh]] and chicken.
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File:Tahu putih.JPG|''Tahu putih'' (firm white tofu)
File:Tahu digoreng.JPG|''[[Tahu goreng]]'' (fried tofu) has brown skin.
File:Tahu sumedang.jpg|''[[Tahu sumedang]]'' with bird's eye chili
File:Cirebon Tahu Gejrot.jpg|''[[Tahu gejrot]]'' with thin light spicy sauce
File:Laksa Bogor 4.JPG|Yellow tofu (tofu colored with turmeric) on top of [[laksa]]
File:Bacem tahu.jpg|''Tahu bacem'', tofu simmered in palm sugar and spices
File:Kembang Tahu.jpg|''[[Douhua|Kembang tahu]]'', served in sweet ginger syrup
File:Frikadel Tahu.jpg|''Perkedel tahu'' goreng (Dutch-Indonesian food based on tofu and Dutch cooking technique) [[Frikadeller]]
File:Tahu Isi.jpg|''Tahu isi'', Indonesian fried tofu filled with vegetable, shrimp, or chicken served with bird eye chili and sweet shrimp [[Shrimp paste|paste]]
File:Tahu Telor in Surabaya.JPG|''Tahu telor or Tahu tek'', omelette tofu served with vegetable, [[krupuk]], peanut sauce, shrimp paste, [[sweet soy sauce]], and [[sambal]]
File:Tahu Kupat.jpg|''Kupat tahu'', tofu served with rice cake, noodles and sweet soy sauce
File:Tahu Campur.jpg|''Tahu campur'', tofu soup with beef and tendon served in broth, [[Soy sauce|soy]] sauce, [[shrimp paste]], vegetable, [[krupuk]] and [[sambal]]
File:Batagor Savoy Homann Bandung.jpg|''Tahu bakso or [[batagor]]'', literally bakso (meatball), tahu (tofu), goreng (fried). Fried tofu filled with fish, tapioca starch, or meat.
File:Baksotahu1.jpg|''Tahu tuna.'' fried tofu filled with grounded tuna. A delicacy from [[Pacitan Regency|Pacitan]], [[East Java]].  
File:Tahu gimbal in Semarang.jpg|''Tahu gimbal.'' a tofu dish with peanut sauce and ''gimbal'' (shrimp fritter) from [[Semarang]].
File:Tahu petis in Semarang.jpg|''Tahu petis.'' fried tofu filled with ''petis'' (black colored [[shrimp paste]] sauce). Originated from [[Semarang]], [[Central Java]].
File:Tahu aci.jpg|''Tahu aci.'' fried tofu stuffed with [[tapioca]] starch. Originated from [[Tegal]], [[Central Java]].
File:Tau Kua Heci.jpg|''Tau kua heci.'' a tofu dish with prawn. It is from [[Binjai]], [[North Sumatra]].
File:Tepo tahu.jpg|''Tepo tahu.'' fried tofu with ''tepo'' (rice cake) and vegetables drizzled with peanut sauce. Originated from central western of [[East Java]].
File:TAHU BULAT.jpg|''Tahu bulat.'' (round tofu). It was created in [[Tasikmalaya]], [[West Java]].
File:Tahu Walik.jpg|''Tahu walik.'' a fried tofu from [[Banyuwangi]], [[East Java]].
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==== Philippines ====
In the [[Philippines]], the sweet delicacy [[taho|tahô]] is made of fresh tofu with brown sugar syrup and [[sago|sagó]]. The Malaysian and Singaporean version of ''taho'' or ''douhua'' is called ''tofufa'' or ''taufufa''. Warm soft tofu is served in slices (created by scooping it from a wooden bucket with a flat spoon) in a bowl with either pandan-flavored sugar syrup or palm sugar syrup.
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File:Taho2.jpg|A cup of taho
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==== Vietnam ====
In Vietnam, tofu pronounced ''đậu phụ'' and ''đậu hũ'' is a variety of soft tofu made and carried around in an earthenware jar.
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Another popular dish with tofu is bún đậu mắm tôm, which is a dish with rice noodles served with tofu and [[shrimp paste]].<gallery>
File:Bún đậu mắm tôm (2019).jpg|Bún đậu mắm tôm
File:Cooking class, Hoi An (32544686338).jpg|Đậu hũ
File:Đậu hũ rán chay, tất niên nhà mệ 2018.jpg|Đậu hũ rán (fried đậu hũ)
File:Bữa cơm gia đình ng6th4n2021 (tô đậu hũ sốt cà) (1).jpg|Đậu hũ sốt cà (đậu hũ with tomato sauce)
File:Món ăn cúng Tất Niên nhà mình, Tết Nhâm Dần 2022 (đậu hũ sốt cà) (3).jpg|Đậu hũ in the Tất niên offering tray
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==== Myanmar ====
{{main|Burmese tofu}}
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=== Elsewhere ===
Generally, the firmer styles of tofu are used for [[kebab]]s, mock meats, and dishes requiring a consistency that holds together, while the softer styles can be used for desserts, soups, shakes, and sauces. Some people enjoy tofu made and prepared with chocolate and making it into pies and mousse along with other tofu desserts. This came about due to vegans and vegetarians avoiding the usage of items such as milk and eggs.
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Firm Western tofu types can be barbecued since they hold together on a barbecue grill. These types are usually marinated overnight as the marinade does not easily penetrate the entire block of tofu. (Techniques to increase the penetration of marinades include stabbing repeatedly with a fork or freezing and thawing prior to marinating.) Grated firm Western tofu is sometimes used in conjunction with [[textured vegetable protein]] (TVP) as a meat substitute. Softer tofus are sometimes used as a dairy-free or low-calorie filler. Silken tofu may be used to replace cheese in certain dishes, such as [[lasagna]]. Tofu has also been fused into other cuisines in the West, for instance in Indian-style curries.
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Tofu and soy protein can be industrially processed to match the textures and flavors of [[cheese]], [[pudding]], [[egg (food)|eggs]], [[bacon]], and similar products. Tofu's texture can also be altered by [[freezing]], [[purée]]ing, and [[cooking]]. In [[the Americas]], [[Europe]], [[Australia]] and [[New Zealand]], tofu is frequently associated with [[vegetarianism]] and [[veganism]], as it is a source of non-animal protein.
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In India tofu is used as a low-fat replacement for [[paneer]], providing a similar texture.
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== Nutrition ==
{{Nutritional value
|name=Tofu (raw, regular)
|kJ=317
|water=85 g
|protein=8 g
|fat=4.8 g
|carbs=1.9 g
|calcium_mg=350
|iron_mg=5.4
|sodium_mg=7
|magnesium_mg=30
|phosphorus_mg=97
|potassium_mg=121
|zinc_mg=0.8
|copper_mg=0.19
|manganese_mg=0.6
|thiamin_mg=0.08
|riboflavin_mg=0.05
| niacin_mg=0.19
| pantothenic_mg=0.07
| vitB6_mg=0.05
| folate_ug=15
| note=[https://fdc.nal.usda.gov/food-details/172476/nutrients Link to USDA FoodData Central Entry]}}
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Raw regular tofu is 85% water, 8% [[protein (nutrient)|protein]], 2% [[carbohydrate]]s, and 5% [[fat]] (table). In a reference amount of {{cvt|100|g}}, tofu supplies 76 [[calorie]]s, and is a rich source (20% or more of the [[Daily Value]]) of [[calcium in biology|calcium]], [[copper in biology|copper]], [[iron in biology|iron]], and [[manganese in biology|manganese]] (table).
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== Chemistry ==
Tofu is made from soy milk which is a [[turbid]] [[colloid]] liquid/solution. Tofu structure is related to soy milk components, particularly colloid components such as protein particles and oil globules. Protein particle content increases with the increase of the globulin ratio in the soybeans. Tofu varieties ensue from adding [[wikt:coagulant|coagulants]] at various concentrations.
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== Proteins ==
The two main components of the soybean important in tofu making are the 11S component, containing glycinin, and the 7S subunit, containing hemagglutinins, lipoxygenases, b-amylase, and β-conglycinin. The major soy protein components, in the two fractions that make up 65–85% of the proteins in soybeans, include glycinin and β-conglycinin. The soybean protein consists of many different subunits, which are sensitive to heat, pH, and ionic strength and become unevenly distributed among soluble and particulate fractions due to hydrophilic and hydrophobic interaction because of the amino acid composition.
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==Politics==
Tofu has been used by politicians to attack their opponents. In October 2022  [[Suella Braverman]] attacked the "[[The Guardian|Guardian]]-reading, tofu-eating wokerati" in the British [[House of Commons]], blaming them for obstructing the roads. In April 2025 [[Markus Söder]], the head of the German  [[Christian Social Union in Bavaria|Christian Social Union]] said that Germany could now look forward to more [[Leberkäse]] — a kind of meatloaf — instead of "Tofu-mania".
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== See also ==
{{div col|colwidth=18em}}
* [[Buddhist cuisine]]
* [[Douhua]]
* [[List of soy-based foods]]
* [[List of tofu dishes]]
* [[Los Angeles Tofu Festival]]
* [[Oncom]]
* [[Seitan]]
* [[Tempeh]]
* [[Veganism]]
* [[Vegetarian cuisine]]
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{{div col end}}
{{Portal bar|Food}}
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== External links ==
{{Sister project links |commons=Category:Tofu |wikt=tofu |b=Cookbook:Tofu |n=no |q=no |s=no |species=no |d=Q177378 |voy=no |v=no}}
* [https://books.google.com/books?id=JTr-ouCbL2AC&dq=dou+fu+contains+calcium&pg=PA801 ''The Oxford companion to food'' Alan Davidson, Tom Jaine]
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{{Japanese food and drink}}
{{Diets}}
{{Soy}}
{{Vegetarianism}}
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[[Category:Tofu| ]]
[[Category:Ancient dishes]]
[[Category:Buddhist cuisine]]
[[Category:Chinese cuisine]]
[[Category:Japanese cuisine]]
[[Category:Korean cuisine]]
[[Category:Meat substitutes]]
[[Category:Soy-based foods]]
[[Category:Vegetarian dishes of China]]
[[Category:Vietnamese cuisine]]
{{二次利用|date=18 June 2025, at 16:45}}
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