Reheating Leftovers: Safe Temperatures
Updated August 15, 2026
Reheat leftovers to an internal temperature of 165°F (74°C), steaming hot throughout, and bring soups, sauces, and gravies to a full boil. It doesn't matter what the food was originally cooked to — reheating has one number.
| Leftover | Best method | Why |
|---|---|---|
| Pizza | Skillet, medium-low, lid at the end | Crisp bottom, melted top — no soggy microwave |
| Rice | Microwave with a splash of water, covered | Steam revives it; see rice-safety notes below |
| Roast meat, sliced | Low oven (275°F) or warm gravy bath | Blasting it just cooks it again |
| Fried food | Oven or air fryer at 375–400°F | The microwave un-fries it |
| Soups, stews, gravy | Pot, stirred, to a boil | The boil is the safety step |
| Casseroles | Covered oven at 350°F to 165°F center | Probe the middle, not the edge |
The rules behind the number
Between 40°F and 140°F is the danger zone where bacteria multiply, so reheating is a race through it — use real heat, not a warm windowsill, and don't reheat in a slow cooker (it crawls through the zone). 165°F throughout kills what grew during storage; for anything liquid, a rolling boil is the easy visual proof.
Reheat only what you'll eat: each cool-and-reheat cycle costs quality and adds another trip through the zone. Officially leftovers can be reheated more than once if they hit 165°F each time — practically, portion first.
Rice deserves its own caution
Uncooked rice can carry Bacillus cereus spores that survive cooking, and their toxin isn't destroyed by reheating. The risk isn't reheated rice — it's rice that sat warm for hours before refrigeration. Cool rice within an hour of cooking, refrigerate up to about four days, reheat until steaming, and you're fine.
Quick answers
- What temperature should leftovers be reheated to?
- 165°F (74°C) in the center, regardless of the food. Sauces, soups, and gravies to a boil.
- How many times can I reheat leftovers?
- Safety-wise, as many times as they genuinely reach 165°F — but quality falls fast and each cycle adds risk in practice. Portion out what you'll eat and reheat once.
- How long do leftovers keep in the fridge?
- Most cooked leftovers: 3–4 days refrigerated. When in doubt, the freezer stops the clock — most leftovers freeze well for 2–3 months.