Herein disclosed is a raw material used for preparing solidified soybean foods comprising the combination of a soybean mixed powder which comprises a soybean powder prepared by the pulverization of dried soybeans, dextrin and an alkali carbonate； and a coagulating agent, and more specifically, a raw material used for preparing solidified soybean foods (such as TOFU and TOFA) which comprises dextrin in an amount ranging from 9 to 40 parts by mass and an alkali carbonate in a rate ranging from 0.15 to 1.6 parts by mass, per 100 parts by mass of the soybean powder as well as a raw material used for preparing a soybean-derived beverage starting from the foregoing soybean mixed powder. Thus, the present invention can provide a soybean mixed powder or the like for use in the preparation of TOFU, TOFA and/or soybean-derived beverages, which have excellent appearance, high pleasantness to the teeth and high nutritive values, which can easily be prepared, for instance, at each home using soybean mixed powder obtained by the pulverization of dried soybeans.
