The primary ingredient used in making tofu is soybeans. Tofu, also known as bean curd, is produced by coagulating soy milk and then pressing the resulting curds into soft white blocks. The process of making tofu involves soaking dried soybeans to soften them, grinding them with water, and boiling the mixture. After boiling, the liquid is separated from the solid soybean pulp, creating soy milk. Coagulants, such as magnesium chloride or calcium sulfate, are then added to curdle the milk, leading to the formation of tofu. Tofu is a staple in many Asian cuisines and is praised for its high protein content and versatility.