For use in the preparation of fast food product such as hot dogs or hamburgers, buns or rolls which are adapted for heating together with a cooked meat product inserted therein are produced from a dough-containing hard white wheat flour as at least part of the starting wheat flour, rice koji and vitamin C. The dough contains a leaving effective amount of yeast and appropriate amounts of conventional additives such as sodium chloride, sugar, oil and fats, milk powder and the like. The dough is free from yeast food, potassium bromate and an emulsifier. The fast food products are packaged with a microwave heatable packaging material in a cooled or refrigerated or frozen state for storage or shipping.