Tofu is soybean curd, made from the liquid extracted from ground, cooked soybeans. It is made in much the same way cheese is made. You will find different tofu labeled as soft, firm, or extra-firm, the difference among these being the amount of liquid pressed out during processing. Soft tofu is best for blending into mixtures such as smoothies, and the firm tofus are best for stir-frying or sauteeing. Tofu if fairly bland, but will take up the flavor of whatever you cook with it.