Mashed potatoes keep 3-4 days in the fridge at 40°F or below, like other leftovers. You can freeze them for about 3-4 months; stir in a little milk when reheating.
Storage times from USDA, FoodSafety.gov, FDA and university extension services. Checked .
How long do mashed potatoes last in the fridge?
3–4 days at 40°F (4°C) or below.
Can you freeze mashed potatoes?
Yes. For best quality use it within 3–4 months. Texture may get watery; stir well when reheating; best quality; safe indefinitely at 0°F.
- Freeze in portions; added butter or cream helps texture.
- Reheat with a splash of milk and stir well.
After thawing: Thaw in the fridge and use within 3-4 days, or reheat straight from frozen to 165°F; fridge-thawed portions can be refrozen.
How long can mashed potatoes sit out?
No more than 2 hours at room temperature, or 1 hour when it's above 90°F (USDA's 2-hour rule). After that, throw it out.
How to tell if mashed potatoes has gone bad
- Sour smell
- Watery, slimy texture
- Mold
Bacteria that cause food poisoning don't always change the look or smell of food, so go by the storage times above. When in doubt, throw it out.
Questions people ask
Can you freeze mashed potatoes?
Yes. Mashed potatoes freeze better than whole cooked potatoes, which turn watery and grainy.
How long are Thanksgiving mashed potatoes good?
Use them within 3-4 days of the meal.