Tofu
A soybean curd staple with over 2,000 years of history.
Tofu, also known as bean curd, is a food made by pressing the curds of coagulated soy milk into solid white blocks of varying softness. Originating in China over 2,000 years ago, it is a traditional component of many East Asian and Southeast Asian cuisines and has become a staple in modern Western cooking as a meat substitute.
- origin
- China
- earliest_recorded_invention
- Han dynasty (179–122 BC, attributed to Prince Liu An)
- earliest_english_documentation
- 1704 translation of Domingo Fernández Navarrete's work
- earliest_known_japanese_record
- 1183 (offering at Kasuga Shrine in Nara)
- key_nutritional_traits
- low in calories, rich source of protein, low land use (1.3 m²/1000 kcal), low greenhouse gas emissions (1.6 kg CO₂/100 g protein)
- common_coagulants
- calcium sulfate (gypsum), magnesium chloride, calcium chloride
Lore & Background
Tofu making was first recorded during the Chinese Han dynasty, with legend attributing its invention to Prince Liu An (179–122 BC) of Anhui province. The most commonly held theory of origin maintains this, though the paucity of reliable sources makes it difficult to conclusively determine. A stone mural from an Eastern Han dynasty tomb unearthed in 1960 provided support, but some scholars argue that Han dynasty tofu was rudimentary and lacked firmness. Alternative theories suggest accidental discovery when boiled soy milk mixed with impure sea salt containing calcium and magnesium salts, or emulation of Mongolian milk curdling techniques, though the latter lacks evidence beyond speculation.
Reader's Guide
Tofu's significance lies in its role as a versatile, protein-rich food with a long history across East and Southeast Asia. Introduced to Japan during the Nara period (710–794) and first recorded there in 965, it became a key protein source in Buddhist vegetarian diets. In China, it was traditionally eaten at graves of deceased relatives, as ghosts were said to have lost their chins and jaws and could only eat soft tofu. Before refrigeration, it was sold mainly in winter due to spoilage in warm months. The production process—soy milk preparation, coagulation, and pressing—mirrors dairy cheese making. Coagulants like calcium sulfate (gypsum) or chloride-type nigari salts produce different textures. Tofu was first mentioned in English in 1704 and popularized in the West by William Shurtleff and Akiko Aoyagi's 1975 book 'The Book of Tofu'. Nutritionally, it is low in calories, high in protein, and has one of the lowest environmental footprints among protein sources.
Did You Know?
- The English word 'tofu' comes from Japanese tōfu, which itself is a borrowing of Chinese dòufǔ.
- Benjamin Franklin mentioned tofu in a 1770 letter to John Bartram, calling it 'cheese' from China.
- The earliest Japanese document concerning tofu refers to it being served as an offering at Kasuga Shrine in Nara in 1183.
- Tofu was traditionally eaten at graves in China because ghosts were believed to have lost their jaws and could only eat soft food.
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