When the frozen boiled rice in the microwave oven thawing and heating, not only the food impression and appearance, the boiled rice revised medicine where you can obtain the boiled rice whose also eating quality and the fragrance are similar to the usual preparation United States is offered. The unit of the individual cell inside the nonglutinous rice United States 1 - 10 weight % it mixes the American powder which compound granule when the cell wall has remained is made the powder into the water, heats and degree of gelatinization 85% or more, it is the boiled rice revised medicine which is made 90% or more desirably. Furthermore, mesh size uses those of the range of 100 - 300 mesh to the aforementioned American powder, heats the viscosity of the boiled rice revised medicine, continually and makes 1/3 or less of the highest value of the viscosity which was measured time-dependant.冷凍米飯を電子レンジで解凍、加熱したときに、食感や外観だけでなく、食味や香りも通常の炊飯米と同様の米飯が得られる米飯改良剤を提供する。うるち米内部の個々の細胞の単位を細胞壁が残った複粒状態で粉にした米粉を水に1~10重量%混合し、加熱して糊化度を85%以上、好ましくは90%以上とした米飯改良剤である。さらに、前記米粉には、メッシュサイズが100~300メッシュの範囲のものを使用し、米飯改良剤の粘度を、連続的に加熱して経時的に測定した粘度の最高値の1/3以下とする。
