How to Tell If Sour Cream Is Bad
Quick answer
Sour cream is bad if it has mold, smells rotten rather than tangy, or looks yellow and slimy. Once opened, it usually keeps 1 to 2 weeks, and you should always toss it if mold appears.
Signs Sour Cream has gone bad
- Mold spots. Pink, green, blue, or black fuzz on the surface or lid means the whole tub is done. Don't just scoop it off.
- Rotten or yeasty smell. Sour cream always smells tangy. If it turns pungent, like spoiled milk or bread dough, it has spoiled.
- Yellowish, dingy color. It should be bright white to off-white. A yellow or gray cast, especially with dried patches, is a bad sign.
- Slimy or chunky texture. Sour cream that's gone lumpy and watery with a slimy feel has been overtaken by bacteria.
- Bitter taste. A bitter flavor beyond its tang means it's past its prime. Stop and throw it out.
Looks weird, but it's fine
- Watery liquid on top. That's whey separating from the cream. Stir it back in or pour it off, and use it if it smells fine.
- Slightly thicker or tangier with age. Cultures continue working, so a mild increase in tang is normal.
- Small curds when stirred into hot dishes. Heat can make sour cream curdle. Add it off heat at the end to keep it smooth; it's a cooking problem, not spoilage.
How long does Sour Cream last?
| Where | How long | Note |
|---|---|---|
| Fridge (unopened) | 1 to 3 weeks past the date | Check the label |
| Fridge (opened) | 1 to 2 weeks | Keep the lid tight |
| Freezer | Up to 4 months | Separates; use in cooked dishes only |
| Counter | Max 2 hours | Return it promptly |
How to store it
- Press a piece of plastic wrap flat on the surface before closing the lid to keep air and mold spores away.
- Store the tub upside down, an old trick that creates a vacuum seal so it lasts longer.
- Always use a clean spoon, and never double dip or return unused portions.
Use it up before it turns
Frequently asked questions
Can I eat sour cream after the date?
Unopened and cold, it often keeps a week or two past the date. Check for mold, off smells, and texture before using, and discard if unsure.
Is the liquid on top of sour cream bad?
No, it's whey. Stir it back in or drain it. If there's also mold or a rotten smell, throw it out.
Can you cut mold off sour cream?
No. It's soft and moist enough for mold to spread through, so toss the whole container.
More food freshness guides
General guidance based on USDA FoodKeeper. Storage times are estimates and conditions vary. When in doubt, throw it out.