How Long Does Half-and-Half Last?
Opened half-and-half lasts 3–4 days in the fridge for best quality, and up to about 1 week. It freezes for about 4 months. Do not leave it out for more than 2 hours.
Half-and-Half — opened
shelf life- Unopened: 1–2 weeks in the fridge
- Unopened, shelf-stable cups: 6 months in the pantry
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.
Half-and-half is an equal blend of whole milk and cream, 10.5 to 18 percent fat, used mainly in coffee. It behaves more like milk than like heavy cream once opened, souring in a matter of days. The little shelf-stable creamer cups are a different case: they are sterilized and sealed, and keep at room temperature until opened.
How to store half-and-half
- Do not leave the carton beside the coffee maker through breakfast; pour, cap it and return it to the fridge each time.
- Store it on an interior shelf. The door is the warmest part of the refrigerator, and half-and-half sours quickly there.
- Freeze extra half-and-half in ice cube trays and use the cubes in cooked sauces, soups and oatmeal, where slight graininess will not show.
- Never top up an old carton with a new one; the older liquid carries bacteria that will sour the fresh batch.
How to tell if half-and-half has gone bad
- White flecks or curds floating in your coffee right after pouring; check that the coffee is not simply very acidic or scalding, then smell the carton.
- A sour, tangy or stale smell at the spout.
- A thickened, lumpy or slimy pour instead of a smooth, thin liquid.
- A puffed-up carton or creamer cup, a sign of gas from bacterial growth.
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.
Half-and-Half shelf life chart
| State | Fridge | Freezer | Pantry |
|---|---|---|---|
| Opened | 3–4 days | 4 months | Not safe |
| Ultra-pasteurized cartons often hold up to 1 week opened if kept cold and capped. | |||
| Unopened | 1–2 weeks | 4 months | Not safe |
| Follow the printed date; ultra-pasteurized cartons are dated several weeks out. | |||
| Unopened, shelf-stable cups | Not recommended | Not recommended | 6 months |
| Single-serve UHT creamer cups: use by the date on the box and discard any that are swollen or leaking. | |||
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
How long does half-and-half last after opening?
Half-and-half is at its best for 3–4 days after opening and generally keeps up to about 1 week at 40°F (4°C) or colder. USDA cold-storage guidance lists 3–4 days. Ultra-pasteurized cartons tend toward the longer end, but the sealed-carton date stops applying once it is opened.
Why does half-and-half curdle in my coffee?
Most often because it has started to sour: rising acidity makes the milk proteins clump when they hit hot, acidic coffee. It can also happen with fresh half-and-half in very hot or very acidic coffee. Smell and taste a little from the carton. If it is sour, discard it.
Can you freeze half-and-half?
Yes, for about 4 months at best quality. It separates in the freezer, so after thawing in the fridge it looks grainy and needs a vigorous shake. It works in cooking and baking. In coffee it is safe, but it may leave small flecks of fat on the surface.
Do the little half-and-half creamer cups need to be refrigerated?
No, not the shelf-stable kind. Single-serve creamer cups are ultra-high-temperature treated and aseptically sealed, so they keep at room temperature until the date on the box. If the carton or cups say 'keep refrigerated', follow that instead. Once a cup is opened, use it right away.
Related foods
| Food | Fridge | Freezer | Pantry |
|---|---|---|---|
| Heavy Cream Opened |
10 days | 3–4 months | Not safe |
| Milk Opened |
1 week | 3 months | Not safe |
| Whipped Cream Opened |
3–4 weeks | Not recommended | Not safe |
| Coffee Brewed |
3–4 days | 1–2 months | 12 hours |
| Oat Milk Opened |
7–10 days | Not recommended | Not safe |
| Irish Cream Liqueur Opened |
6 months | Not recommended | 6 months |
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.