How long does cottage cheese last?

Cottage cheese keeps about 2 weeks in the fridge from the day you buy it, and about 1 week once opened. The USDA doesn't recommend freezing it.

Food	Fridge	Freezer
Cottage cheese	2 weeksfrom purchaseOpened: 1 week	Not recommended

Fridge at 4 °C (40 °F) or colder, freezer at −18 °C (0 °F). Freezer times are for best quality: food kept frozen stays safe, but slowly loses taste and texture. These times are USDA guidance, not a guarantee. When in doubt, throw it out.

How to tell if cottage cheese has gone bad

A sour, yeasty or bitter smell beyond its usual mild tang.
Mold of any color: throw out the whole tub.
Yellowish curds, or a lot of watery liquid with a slimy texture.

How to store cottage cheese

Keep it on a fridge shelf, not in the door, with the lid tightly closed.
Use a clean spoon every time.
Write the opening date on the lid: the week starts then.
Some people store the tub upside down to limit air contact; it works only if the lid seals well.

Can you freeze cottage cheese?

The USDA doesn't recommend it: the curds turn grainy and watery when thawed. If you do freeze it, use it only in cooked dishes like lasagna, casseroles or pancakes, and drain the liquid first.

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