Whether they're plain, jelly-filled or topped with chocolate or sprinkles, or if they're homemade from your own kitchen or purchased from your favorite doughnut shop, nothing puts the comfort in comfort food like fresh doughnuts. Doughnuts are best the day they are made. Reheated doughnuts might not be quite as good as freshly made, but they're pretty close. Heat the doughnuts just until they're warm, then serve them immediately.
Warming in the Microwave
Place the doughnuts on a microwave-safe plate.
Moisten a paper towel and squeeze out the water so the towel is slightly damp. Cover the doughnuts with the moist paper towel.
Heat the doughnuts for about 8 seconds, or until they're just barely warm. Don't overheat them, because bread products can become tough in the microwave.
Reheating in the Oven
Preheat the oven to 350 degrees F.
Place the doughnuts on a cookie sheet or baking pan.
Warm the doughnuts, uncovered, for about 5 minutes. Serve the warm doughnuts immediately.