How long do mashed potatoes last?

Checked 24 Oct 20263 official publishers, 4 sources

Mashed: 3-4 days in the fridge and 1-2 months in the freezer for best quality.

Storage times for mashed potatoes by state and place
StateCounterFridge 40 °FFreezer 0 °F
Mashed 2 hours max CDC 3-4 days FoodKeeper 1-2 months best quality FoodKeeper Also stated: 10-12 months FoodKeeper
Times assume continuous refrigeration at 40 °F or below. When in doubt, throw it out. Freezer times are for quality: “Because freezing 0° F (-18° C) keeps food safe indefinitely, the following recommended storage times are for quality only.” FDA

Sources compared

SourceStateCounterFridgeFreezer
USDA FSIS (FoodKeeper) 2018Mashed-3-4 days1-2 months
USDA FSIS (FoodKeeper) 2018Mashed--10-12 months
CDC 2025Mashed2 hours--

A dash means that source gives no time for that place.

Handling and freezing notes

  • “you could cook and mash them ... for freezer storage, but again, they will retain best quality only for a few weeks in the freezer.” Extension

What the sources say

FoodKeeper's entry for leftovers without meat, fish, poultry or egg names potatoes among them and gives 3 to 4 days in the fridge and 1 to 2 months in the freezer.1

Its entry for potatoes adds a freezer time of 10 to 12 months and says that timeline applies to cooked and mashed potatoes.2

The National Center for Home Food Preservation gives a much shorter freezer time than that 10 to 12 months: it mentions cooking and mashing potatoes as one way to freeze them, but says they keep best quality for only a few weeks in the freezer.42

Rules that apply here

The 2-hour ruleFreezing and refreezingReheating to 165 °FFridge and freezer temperature
Potato saladCooked riceCooked pasta

Sources

  1. USDA FoodKeeper data v128, product 174: Leftovers, without meat, fish, poultry, or egg (such as cooked vegitables, rice, or potatoes). USDA FSIS (FoodKeeper). Dated 2018-09-06. Checked 2026-10-24. Leftovers, without meat, fish, poultry, or egg (such as cooked vegitables, rice, or potatoes). Refrigerate: 3-4 Days; Freeze: 1-2 Months
  2. USDA FoodKeeper data v128, product 297: Potatoes. USDA FSIS (FoodKeeper). Dated 2018-09-06. Checked 2026-10-24. Freeze: 10-12 Months (Freezer timeline applies to cooked and mashed potatoes.)
  3. Preventing Food Poisoning | Food Safety | CDC. CDC. Dated 2025-11-24. Checked 2026-10-24. Never leave perishable food out for more than 2 hours (or 1 hour if exposed to temperatures above 90°F).
  4. Preserving Potatoes - National Center for Home Food Preservation. National Center for Home Food Preservation (University of Georgia). No date on the page. Checked 2026-10-24. you could cook and mash them ... for freezer storage, but again, they will retain best quality only for a few weeks in the freezer.
  5. REFRIGERATOR & FREEZER STORAGE CHART. FDA. Dated 2018-03-01. Checked 2026-10-24. Because freezing 0° F (-18° C) keeps food safe indefinitely, the following recommended storage times are for quality only.