How Long Does Cornmeal Last?
Regular degerminated cornmeal lasts 6–12 months in the pantry and about 1 year in the fridge. Stone-ground or whole-grain cornmeal lasts only about 1 month in the pantry, so keep it in the fridge or freezer.
Cornmeal — dry (uncooked)
shelf life- Dry (uncooked), stone-ground: 2–3 months in the fridge
- Cooked: 3–4 days in the fridge
Fridge at 40°F (4°C) or below · freezer at 0°F (−18°C). Freezer times are for best quality; frozen food stays safe longer.
Cornmeal is dried corn ground to a coarse or fine meal. Most supermarket cornmeal is degerminated, meaning the oily germ has been removed so it keeps for many months. Stone-ground and whole-grain cornmeal keep the germ for better flavor, and like whole wheat flour they turn rancid quickly unless stored cold.
How to store cornmeal
- Check the label for 'degerminated' versus 'stone-ground' or 'whole grain'; that one word decides whether the bag belongs in the pantry or the freezer.
- Transfer cornmeal from its paper bag or cardboard canister to an airtight container, since it is a favorite of weevils and Indian meal moths.
- Freeze a new bag for 4 days before shelving it if you have had pantry pests, to kill eggs that may have come with it.
- Pour leftover cooked polenta into a greased loaf pan before refrigerating; it sets firm and can be sliced and pan-fried within 3–4 days.
How to tell if cornmeal has gone bad
- A sour, musty or bitter, oily smell; fresh cornmeal smells sweet and like corn.
- Small dark weevils, larvae, or strands of webbing that bind the meal into clumps.
- Blue-green or black specks of mold, or damp lumps, from moisture in the container.
- A bitter, stale taste in cornbread made with it, the usual sign that stone-ground meal has gone rancid.
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.
Cornmeal shelf life chart
| State | Fridge | Freezer | Pantry |
|---|---|---|---|
| Dry (uncooked) | 1 year | 1–2 years | 6–12 months |
| Standard degerminated cornmeal, dry polenta and quick grits. | |||
| Dry (uncooked), stone-ground | 2–3 months | 6 months | 1 month |
| Whole-grain meal with the germ left in. Refrigerate or freeze from the day you buy it. | |||
| Cooked | 3–4 days | 2–3 months | Not safe |
| Cooked polenta and grits. Refrigerate within 2 hours. | |||
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
Does cornmeal go bad?
Yes, eventually. Degerminated cornmeal holds good quality for 6–12 months in the pantry and is often fine beyond its date if dry, sweet-smelling and insect-free. Stone-ground cornmeal contains corn germ oil and goes rancid in about a month at room temperature unless it is refrigerated or frozen.
What are the black specks in my cornmeal?
In stone-ground or whole-grain cornmeal, dark flecks are usually bits of the kernel's tip cap and hull and are normal. Specks that move, fine webbing, or clusters of tiny dark beetles indicate weevils, and the package should be discarded and the shelf cleaned.
Should cornmeal be refrigerated?
Stone-ground and whole-grain cornmeal should be; regular degerminated cornmeal does not need it. If you use cornmeal only a few times a year, the fridge or freezer is still a good idea, since cold storage roughly doubles its useful life and keeps insects out.
How long does cooked polenta or grits last?
Cooked polenta and grits last 3–4 days in the fridge in a covered container. They are moist, low-acid foods, so refrigerate them within 2 hours of cooking. Dishes made with milk, cheese or butter follow the same limit and reheat best with a splash of liquid.
Related foods
| Food | Fridge | Freezer | Pantry |
|---|---|---|---|
| Flour Dry (uncooked) |
1 year | 1–2 years | 6–12 months |
| Whole Wheat Flour Dry (uncooked) |
6–8 months | 1 year | 1–3 months |
| Cornstarch Dry (uncooked) |
Not recommended | Not recommended | Indefinitely |
| Breadcrumbs Store-bought |
Not recommended | 1 year | 6 months |
| Popcorn Dry (uncooked) |
Not recommended | Not recommended | 1–2 years |
| Baking Powder Opened |
Not recommended | Not recommended | 3–6 months |
More baking staples: Baking Soda, Brown Sugar, Sugar, Yeast.
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.