what temp should food be reheated to
1 Food made in-house and reheated for hot holding must reach an internal temperature of at least 165Â°F for 15 seconds. 2  Food made in a food processing plant, opened in the food establishment, and reheated for hot holding must reach a temperature of 140Â°F. 3  Reheat foods rapidly, within two hours.icrowave cooking and reheating. If cooking or reheating foods in a microwave, heat all parts of the food to 165Â°F. Cover and rotate or stir the food during the process. Afterwards, allow the covered food to stand for two minutes before serving.