Black beans B are coated with a mineral layer 1 containing calcium powder and dolomite powder, a dough layer 2 formed by roasting a dough mixture containing flour, and an outside layer 3 formed by solidifying a seasoning mixture containing, for example, soymilk powder and powdered tea with hardened fat or oil. In 30 parts by weight of black beans, from 2 to 5, both inclusive, parts by weight of the calcium powder, from 30 to 45, both inclusive, parts by weight of the dolomite powder, and from 5 to 15, both inclusive, parts by weight of the soymilk powder, are contained.
