bean curd

Bean curd, also known as tofu, is a processed food derived from soybeans (Glycine max), originating in China and widely consumed throughout East and Southeast Asia. The ingredient is produced by coagulating soy milk—made by grinding soaked soybeans and filtering the resulting liquid—and pressing the resulting curds into blocks. The coagulation process typically employs calcium sulfate, nigari (magnesium chloride), or gypsum as coagulating agents, which determines the final texture and firmness. Bean curd ranges in texture from silken and custard-like to extra-firm and crumbly, with a neutral, slightly beany flavor that readily absorbs surrounding seasonings and sauces. Color is typically pale cream to white, and the ingredient maintains a porous structure that facilitates absorption of marinades and braising liquids.

Bean curd is a fundamental protein source in Chinese, Japanese, Korean, Vietnamese, and other Asian cuisines, appearing in both savory and sweet preparations. Common applications include stir-frying (particularly with fermented black beans, chili paste, or oyster sauce), braising in soy-based broths, deep-frying to create a crispy exterior with soft interior, and blending into soups and curries. Silken varieties are used in desserts and chilled preparations, while firmer blocks are suited to grilling, pressing, and incorporation into grain-based dishes. The ingredient pairs well with ginger, garlic, soy sauce, sesame oil, and leafy greens. Proper handling—draining excess moisture and gentle manipulation—prevents crumbling during cooking.