How can I reheat leftovers evenly in a microwave?

Use a repeatable cycle: arrange, cover, heat, move the food around, then check. Before heating, spread the food into a reasonably even layer rather than leaving a deep mound in one part of the dish. That is a practical way to set up the portion; it does not guarantee even heating. Cover the food, then rotate or stir it once or twice while it reheats. USDA FSIS recommends covering microwave-reheated leftovers and rotating or stirring once or twice during cooking. [S1]

After heating, check several places with a food thermometer. FSIS says leftovers should reach 165°F throughout. [S1] If a spot is below that, continue reheating and check again in multiple places. Don't rely on steam, color, or a hot-looking surface as proof that the whole portion has reached the target.

Aim for a layout that makes it easy to move the food around and sample more than one location with the thermometer. For pieces or portions, place them in a roughly even layer where practical, rather than stacking everything into one tall heap. For a mixed dish, spread it out as evenly as you can. These are organizing suggestions, not a substitute for checking the temperature throughout.

For example, if you have a serving of rice with several pieces of cooked vegetables, arrange the portions across the dish instead of piling them all in the center. Cover the dish, heat it, stir or rotate once or twice, and check multiple spots—including different parts of the mixture. The source guidance does not specify a particular dish shape, spacing pattern, microwave setting, or heating time, so don't treat this example as a timed recipe.

Cover the food during microwave reheating; that is part of the FSIS recommendation. [S1] The guidance here does not specify which cover or material to use. Use a cover you know is suitable for your microwave, and follow its instructions. If you are unsure whether a particular item is suitable, don't guess. Covering follows the recommended process, but it does not replace stirring or temperature checks.

Yes. Here is a reusable routine:

1. Arrange: Spread the leftovers out as evenly as practical.
2. Cover: Use a cover suitable for your microwave.
3. Reheat: Begin heating, then rotate or stir the food once or twice during cooking. [S1]
4. Check: Use a food thermometer in several places. The target is 165°F throughout. [S1]
5. Continue if needed: If any checked location is below 165°F, reheat further and check several places again before serving.

For example, you could note: “Covered; stirred once; checked in three places; one spot was below 165°F; reheated and rechecked.” The number of checks in that note is just an example of recording what you did, not a prescribed count. FSIS specifies checking several places, but the guidance does not establish exact heating times or settings for a particular microwave, portion, or dish. [S1]