How Long Does Butter Last?
Butter lasts 1–3 months in the fridge and 6–9 months in the freezer. A small amount of salted butter can sit covered on the counter for 1–2 days; refrigerate the rest.
Butter — opened
shelf life- Unopened: 1–3 months 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.
Butter is churned cream, about 80 percent milk fat with very little water, which is why it outlasts almost every other dairy food. Its main enemy is not bacteria but rancidity: air, light and warmth oxidize the fat. Salted butter keeps somewhat longer than unsalted because salt slows both microbes and off-flavors.
How to store butter
- Keep butter in its foil or paper wrapper inside a closed container or the covered butter compartment, because it absorbs odors from onions, fish and leftovers very easily.
- Leave out only what you will use in a day or two, in a covered butter dish away from the stove and sunlight, and refrigerate the rest.
- Freeze extra sticks in their original box inside a freezer bag; they thaw overnight in the fridge and can be grated straight from frozen for baking.
- Use a clean knife each time so toast crumbs and jam do not end up in the butter, where they grow mold.
- Keep unsalted butter in the fridge or freezer at all times; without salt it turns sour and rancid noticeably faster.
How to tell if butter has gone bad
- A sharp, sour, soapy or paint-like smell or taste, which means the fat has gone rancid.
- A darker, translucent yellow layer on the outside that tastes stale compared with the pale butter inside.
- Spots of blue, green, black or pink mold, usually where crumbs or moisture got in.
- A strong taste of other foods from the fridge, a sign it was stored uncovered.
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.
Butter shelf life chart
| State | Fridge | Freezer | Pantry |
|---|---|---|---|
| Opened | 1–3 months | 6–9 months | 1–2 days |
| Counter storage is for salted butter in a covered dish in a cool kitchen. Keep unsalted and whipped butter refrigerated. | |||
| Unopened | 1–3 months | 6–9 months | Not recommended |
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 butter need to be refrigerated?
For anything beyond 1–2 days, yes. USDA guidance allows butter at room temperature for a day or two, but flavor turns rancid quickly after that, especially in a warm kitchen. Keep a small amount of salted butter in a covered dish if you want it spreadable, and store the rest in the fridge.
How long can butter sit out on the counter?
Salted butter can sit out, covered, for 1–2 days in a kitchen that stays below about 70°F (21°C). In hotter rooms it softens, separates and goes rancid faster, so refrigerate it. Unsalted, whipped and homemade butter should not be kept on the counter.
Can you use butter after the expiration date?
Usually, if it has stayed refrigerated. The date on butter is a quality date, and well-wrapped butter is often fine for weeks beyond it, within the overall 1–3 month fridge window. Cut off a piece and smell it: a sour or soapy odor or any mold means it should be thrown out.
Can you freeze butter?
Yes. Butter freezes better than any other dairy product and keeps best quality for 6–9 months at 0°F (−18°C). Leave it in its original wrapper and add a freezer bag to block odors. Thaw it in the fridge overnight; the texture and baking performance are unchanged.
What does rancid butter taste like, and is it dangerous?
Rancid butter tastes sour, bitter or soapy and may smell like old cooking oil. Eating a little is unlikely to make you ill, because rancidity is a chemical change in the fat rather than bacterial growth, but it tastes unpleasant and will spoil anything you bake with it.
Related foods
| Food | Fridge | Freezer | Pantry |
|---|---|---|---|
| Ghee Opened |
6–12 months | 1 year | 3 months |
| Margarine Opened |
2–3 months | 1 year | Not recommended |
| Heavy Cream Opened |
10 days | 3–4 months | Not safe |
| Cream Cheese Opened |
2 weeks | Not recommended | Not safe |
| Milk Opened |
1 week | 3 months | Not safe |
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.