How to Reheat Thanksgiving Leftovers

Reheat to 165°F, all the way through. That is the internal temperature cooked poultry is taken to, and reheated food needs to get back there rather than merely feeling warm. The failure mode with a microwave is not that it cannot reach 165°F; it is that it reaches it at the edges while the middle is still at refrigerator temperature.

Then keep it at or above 140°F. The 40°F-to-140°F band is where bacteria multiply, and food sitting out at room temperature has a two-hour limit. On the second day that limit is easy to breach, because leftovers get grazed over an afternoon rather than served at a sitting. Hold them properly or put them back in the refrigerator between rounds.

Reheat once, not repeatedly. Take out what you are going to eat, bring that up to 165°F, and leave the rest cold. Reheating the whole dish three times is both a safety problem and the reason turkey ends up like cardboard.

Roasted turkey was cooked to doneness once. There is no moisture margin left in it, so reheating with dry heat only takes it further. The answer is to put liquid back.

The method. Lay the sliced meat in a shallow dish, spoon over two or three tablespoons of stock or leftover gravy per portion, cover tightly with foil or a lid, and warm it at a moderate oven temperature — around 325°F — until the center reads 165°F. Fifteen to twenty-five minutes depending on thickness. The foil is not optional; it is what turns the oven into a steam environment.

Slice thicker than you think. Thin slices give up their moisture instantly. Half-inch slices survive reheating far better, which is also an argument for carving leftovers off the carcass rather than reheating slices carved yesterday.

If you must microwave: cover it, add liquid, use medium power rather than full, and stop halfway to rearrange. Full power uncovered is what produced every bad reheated turkey anyone has eaten.

• Stuffing or dressing. Oven, covered, with a splash of stock, then the last ten minutes uncovered to bring the top back. This is the dish that benefits most from an oven and suffers most in a microwave.
• Mashed potatoes. Stovetop over low heat or a slow cooker, with a splash of milk or cream and a knob of butter stirred through. Never an oven — the top crusts and the middle stays cold.
• Gravy. Small saucepan, low heat, whisked. It will have set solid; it comes back completely. Thin it with stock rather than water.
• Green bean casserole and similar bakes. Oven, covered, then uncovered for the last five to ten minutes to re-crisp the topping. A microwave cannot re-crisp anything.
• Rolls. Wrapped in foil, hot oven, five minutes. They come back remarkably well. Unwrapped, they turn into rusks.
• Roasted vegetables. The exception to the moisture rule: these want a hot oven or a skillet, uncovered, to drive moisture off and bring the edges back.

Reheating one plate is a microwave job. Reheating Thanksgiving dinner for nine the next day is a logistics job, and it is the same logistics problem as the day before — one oven, several dishes, a holding window.

The arrangement that works: turkey and anything moist in a covered roaster oven, casseroles and rolls in the wall oven where they can be uncovered to crisp, potatoes and gravy on the stovetop or in a slow cooker. Then everything moves to a buffet server or a warming tray and stays above 140°F while people serve themselves.

That is three heat sources working in parallel instead of nine microwave cycles in series, and it is the difference between a second dinner and a queue. The full ranking of holding methods is in how to keep food warm for a party.

Most of the quality of reheated leftovers is determined before they ever get reheated, and the single biggest factor is how quickly they got cold.

Get food out of the danger zone promptly rather than leaving bowls on a counter while you sit down with a drink. The two-hour room temperature limit applies to the leftovers as much as to the meal. Divide large quantities into shallow containers rather than one deep tub, because a deep container cools from the outside in and the middle spends hours in the wrong temperature band.

Three habits that pay off the next day: carve the remaining meat off the carcass rather than refrigerating a whole bird, keep some of the gravy and stock back specifically for reheating rather than serving all of it, and store the crisp things separately from the wet things. Use the leftovers within the first few days and freeze anything you will not get to.