The main purpose of the present invention is to provide a technique for putting a food composition containing cereal grains to practical use as a retort food, said technique comprising imparting a property of being easily and uniformly filled into a retort container and excellent post-cooking taste and texture to the food composition. A food composition obtained by dispersing cereal grains in a viscous solution comprising xanthan gum, guar gum and water can keep the cereal grains in a uniformly dispersed state for a long time, exhibits a fluidity suitable for being filled into a retort container, and can be filled into a retort container easily and uniformly. Further, when processed to a retort food and cooked with heat, the food composition exhibits good taste and texture.本發明主要之目的在於,對於包含穀類之食品組成物,使其具備可對殺菌調理容器進行簡便且均勻填充的填充合適性,且使其在加熱調理後具備優良之食物味道及口感,藉此提供將該食品組成物作成殺菌調理食品而實用化的技術。亦即,在包含三仙膠、瓜爾膠及水的黏性溶液中添加穀類並使之分散而成的食品組成物,其可長時間維持穀類均勻分散之狀態,並且具備適合填充至殺菌調理容器的流動性,而可對殺菌調理容器進行簡便且均勻的填充。此外,該食品組成物若是製作成殺菌調理食品並加熱調理,會呈現出良好的食物味道及口感。