How Long Does Flour Last?
All-purpose flour lasts 6–12 months in the pantry, about 1 year in the fridge and 1–2 years in the freezer in an airtight container. Raw flour is not ready-to-eat, so do not taste raw dough or batter.
Flour — dry (uncooked)
shelf lifeFridge at 40°F (4°C) or below · freezer at 0°F (−18°C). Freezer times are for best quality; frozen food stays safe longer.
All-purpose flour is wheat milled with the oily bran and germ removed, which is why it keeps far longer than whole grain flour. It is dry enough to resist bacteria and mold, but it slowly oxidizes, absorbs odors and attracts pantry insects. It is also a raw agricultural product that has not been treated to kill germs.
How to store flour
- Move flour out of its paper sack into an airtight plastic, glass or metal container. Paper lets in moisture and odors, and weevils chew straight through it.
- Freeze a newly bought bag for 4 days to kill any insect eggs that came from the mill, then store it in the pantry as usual.
- For fridge or freezer storage, use a rigid sealed container and let the amount you need come to room temperature before baking; cold flour slows yeast and can make batters lumpy.
- Keep flour away from onions, spices, soap and cleaning products. It picks up strong smells readily and carries them into baked goods.
How to tell if flour has gone bad
- A sour, musty, or play-dough-like smell instead of a neutral, faintly wheaty scent.
- Tiny brown beetles (flour weevils or flour beetles), larvae, or webbing and clumps from pantry moths.
- Hard lumps, damp patches or any mold, which mean moisture has gotten in.
- A yellowish or grayish tint and a bitter taste in baked goods made with it.
Bacteria that cause food poisoning usually do not change the look, smell or taste of food. Go by the time limits first, and the signs above second.
Flour shelf life chart
| State | Fridge | Freezer | Pantry |
|---|---|---|---|
| Dry (uncooked) | 1 year | 1–2 years | 6–12 months |
| White all-purpose, bread and cake flour, opened or not. Self-rising flour: 4–6 months, because its baking powder fades. | |||
Not safe = perishable: no more than 2 hours at room temperature (1 hour above 90°F / 32°C). Not recommended = possible, but quality suffers or it serves no purpose.
Frequently asked questions
Can you use flour after the expiration date?
Usually yes, for several months if it was stored well. The printed date is a best-quality estimate. White flour that smells neutral, looks uniform and has no insects is fine to bake with. Self-rising flour is the exception: past its date, the leavening may be too weak to raise your baking.
Is it safe to eat raw flour?
No. FDA and CDC warn that flour is a raw food that can carry E. coli and Salmonella from the field, and outbreaks have been linked to raw dough and batter. Baking, frying or boiling makes it safe. Do not taste raw dough, and wash hands and surfaces after working with flour.
What are the little bugs in my flour?
They are most likely flour beetles or weevils, tiny reddish-brown insects that arrive as eggs in grain products or migrate from other infested packages. Throw out infested flour, check nearby cereal, pasta and rice, vacuum the shelves, and store replacements in hard airtight containers.
Should flour be stored in the fridge or freezer?
It is optional for white flour and worthwhile if you bake rarely or live somewhere hot and humid. Airtight in the freezer, all-purpose flour keeps 1–2 years. Whole grain and nut flours benefit much more from cold storage, because their oils go rancid quickly at room temperature.
Can old flour make you sick?
Old flour that is merely stale will give flat-tasting or musty baked goods but is unlikely to cause illness. Flour that has gotten damp and moldy is different and should be discarded, since some molds produce toxins that survive baking.
Related foods
| Food | Fridge | Freezer | Pantry |
|---|---|---|---|
| Whole Wheat Flour Dry (uncooked) |
6–8 months | 1 year | 1–3 months |
| Cornmeal Dry (uncooked) |
1 year | 1–2 years | 6–12 months |
| Baking Powder Opened |
Not recommended | Not recommended | 3–6 months |
| Yeast Opened |
4 months | 6 months | Not recommended |
| Sugar Dry (uncooked) |
Not recommended | Not recommended | Indefinitely |
| Cookie Dough Homemade |
2–4 days | 2 months | Not safe |
More baking staples: Baking Soda, Brown Sugar, Cornstarch.
Reviewed 2026-09-20. Times follow published USDA FoodKeeper / FSIS, FDA and CDC storage guidance; where sources differ we use the shorter time. How we compile this data.