block tofu

Block tofu is a curd product made from soybeans (Glycine max), originating in ancient China and spread throughout East and Southeast Asia. Produced by coagulating soy milk with nigari (bittern) or gypsum and pressing the resulting curds into compact rectangular blocks, block tofu has a firm, dense texture and mild, subtly nutty flavor. The ingredient is sold in various firmness grades—silken, soft, medium, firm, and extra-firm—with texture determined by moisture content and pressing duration. Standard block tofu (firm to extra-firm varieties) maintains structural integrity when cut and cooked, distinguishing it from silken tofu, which is unpressed and custard-like.

Block tofu is a versatile protein foundation in East and Southeast Asian cuisines. Firm and extra-firm varieties are ideal for stir-frying, pan-searing, grilling, and deep-frying, where they develop a golden crust while maintaining interior texture. In China and Taiwan, block tofu appears in mapo tofu, braised dishes, and hot pots. Japanese cuisine features it in agedashi tofu (fried) and nimono (braised preparations). Korean cuisine employs it in dubu-jorim (seasoned braised tofu) and soondubu stews. Southeast Asian cuisines incorporate block tofu into curries, soups, and stir-fries. The ingredient absorbs marinades and seasonings effectively; pressing before cooking removes excess moisture and improves browning and flavor absorption.