Shared Origins and the Core Product
At its most fundamental level, tofu is indeed a type of beancurd. The word "tofu" is a direct transliteration of the Japanese term, which in turn comes from the Chinese term dòufǔ, meaning "bean" and "curdled". This shared etymology points to their identical origin and basic manufacturing process.
The Cheesemaking Process of Tofu/Beancurd
The creation of tofu is analogous to making dairy cheese. The process involves three simple ingredients: soybeans, water, and a coagulant.
- Preparation: Dried soybeans are soaked in water for several hours until they soften.
- Milling and Boiling: The soaked beans are ground into a slurry, which is then boiled to produce soy milk.
- Coagulation: A mineral-based coagulant, such as calcium sulfate (gypsum) or magnesium chloride (nigari), is added to the hot soy milk. This causes the milk to curdle, separating it into solid curds and a liquid whey.
- Pressing: The curds are collected, pressed to remove the excess liquid, and molded into blocks. The amount of pressure and pressing time determines the final firmness of the block.
The Expansion of the Term 'Beancurd'
While tofu universally describes the pressed block of soy curds, "beancurd" is a broader term used in Chinese and Southeast Asian cuisine to refer to a variety of soy-based derivatives beyond the simple block. This is where the distinction between the two names primarily lies.
Diverse forms of beancurd
- Dried Tofu Skin (Yuba): This product is the delicate, yellowish skin that forms on top of boiling soy milk. It is sold in fresh, dried, or frozen forms and can be rehydrated for use in soups or stir-fries. Dried tofu skin is a prime example of a "beancurd" product that isn't the standard tofu block.
- Fermented Beancurd (Fǔrǔ): Also known as preserved tofu, this is an aged product where cubes of tofu are fermented with rice wine, salt, and seasonings. It has a pungent, salty, and creamy flavor, similar to some cheeses, and is used as a condiment or marinade.
- Fried Tofu Puffs: These are deep-fried cubes of firm tofu that become light and spongy. Their hollow center makes them excellent for soaking up sauces and broths in stews and curries.
Comparison Table: Tofu vs. Other Beancurd Products
| Feature | Standard Block Tofu | Tofu Skin (Dried Beancurd) | Fermented Beancurd | Fried Tofu Puffs (Beancurd) |
|---|---|---|---|---|
| Form | Water-packed solid block | Thin, dried sheets or sticks | Small, preserved cubes | Deep-fried, hollow squares |
| Texture | Silken, soft, firm, extra-firm | Soft and rubbery when rehydrated | Soft and spreadable | Light, porous, and spongy |
| Common Use | Stir-fries, scrambles, smoothies, grilling | Soups, braised dishes, stir-fries | Condiment, marinade, sauce base | Soups, curries, stews |
| Processing | Coagulated and pressed curds | Skimmed off the surface of boiling soy milk | Aged and preserved curds | Deep-fried curds |
| Flavor | Mild, neutral; absorbs flavors well | Subtle soybean flavor | Pungent, salty, umami | Neutral, ready to absorb flavors |
The Nutritional Aspect
From a nutritional standpoint, the core block of tofu and other beancurd products share many benefits as they are all derived from soybeans. They are excellent sources of plant-based protein and contain all nine essential amino acids. The pressing process for block tofu concentrates these nutrients, making firmer varieties denser in protein and minerals like calcium and iron.
Variations in the manufacturing and processing methods can lead to slight differences in the nutritional profile. For example, fermented beancurd will have additional salt content due to the preservation process, while fried puffs will contain more oil. For a more detailed comparison of soybean-derived products, including the original bean, the website Food Struct offers a comprehensive overview.
The Modern Usage of Terminology
In modern, Western culinary contexts, the term "tofu" has become the most widely used and understood word for the block soy product. Supermarkets label their water-packed blocks of varying firmness as "tofu". However, in many Asian markets and traditional recipes, the term "beancurd" remains common, especially when referring to the wider variety of soy derivatives.
This difference in nomenclature is simply a matter of cultural and linguistic convention rather than a true distinction in the core product. It is similar to how the term "pork" can refer to a whole range of products from a pig, not just a standard cut of meat. A deep-fried tofu puff is still a product of beancurd, but one would not typically refer to it as a block of tofu.
Conclusion: So, Is Beancurd the Same as Tofu?
Yes, at its heart, beancurd is the same as tofu, as the latter is a type of beancurd. The terms are often used interchangeably to refer to the coagulated and pressed block of soy milk. However, the key distinction lies in the broader application of the term "beancurd," particularly in Asian cuisine, to include various other soy products like tofu skin, fermented cubes, and fried puffs. The block of protein you buy from the store is always tofu, but not all products called "beancurd" are that standard block. The answer depends on the context and the specific product being referenced.