Tofu (and its many forms)

What it is

Coagulated soy milk pressed into curd — a single ingredient that fragments into a dozen distinct products by water content, treatment, and fermentation.

How it's made

Soy milk is coagulated with a salt (nigari/magnesium chloride or calcium sulfate) or acid; the curds are then pressed to varying firmness, or further processed.

Forms & how they function — - **Silken (kinugoshi):** unpressed, custardy; for chilled hiyayakko, soups, blending, desserts. Delicate, eaten as-is. - **Firm / extra-firm (momen): pressed, holds shape; for frying, stir-fries, grilling. - Freeze-dried (koya-dofu / kōyadōfu): frozen and dried into a spongy block that rehydrates into a chewy, absorbent protein for simmered dishes — a centuries-old preservation form. - Smoked tofu: firm tofu cold/hot-smoked; sliced like charcuterie, eaten cold or stir-fried. - Fermented (sufu / furu, "fermented bean curd"):** cubes fermented with mold and aged in brine, rice wine, or chili — pungent, salty, spreadable "Chinese cheese"; a seasoning protein for greens, congee, and marinades. - Fried forms: aburaage (thin, deep-fried sheets that puff into pockets — stuffed for inari-zushi, sliced into miso soup and udon); atsuage / namaage (thick blocks fried so the outside crisps and the inside stays soft); ganmodoki (mashed tofu fritters with vegetables and seaweed, simmered in oden).

Flavor profile

Mild and beany fresh; smoking, frying, and fermentation add smoke, savor, and funk respectively.

Cultural & historical context

A 2,000-year-old Chinese invention diffused across East Asia, each culture spinning it into its own forms; fermented and freeze-dried tofu show preservation logic applied to a fresh curd.

Reference notes

Tags: `soy`, `tofu`, `coagulated`, `fermented`, `fried`, `pan-asian`. Related: yuba, tempeh, sufu. Cuisines: Chinese, Japanese, Korean. Links → Yuba, Inari-zushi, Mapo Tofu, Sufu.