Guides › How long does food last › Buttermilk
How long does buttermilk last?
Buttermilk keeps for about 1 to 2 weeks in the refrigerator. Counted from the date of purchase.
| Where | How long |
|---|---|
| Refrigerator | 1 to 2 weeks |
| Freezer | 3 months |
Storage times are the USDA FoodKeeper guidance for quality and safety, not a guarantee; a printed use-by date on the package comes first. Source: USDA FSIS FoodKeeper (CC0), fetched 2026-10-27, category Dairy Products & Eggs.
How Known uses thisWhen a receipt lists buttermilk, Known estimates an expiry from the purchase date and typical shelf life and shows which rule it used, for example "7-day rule". Shelf-stable staples get no date at all.
Stop finding it in the back of the fridge
One receipt photo, and every grocery line gets an estimated use-by date and a reminder. No account, nothing to type.
Open Known, it is freeMore in Dairy Products & Eggs
Butter1 to 2 monthsCheese, hard such as cheddar, swiss, block parmesan6 monthsCheese, parmesan; shredded or grated12 monthsCheese, shredded; cheddar, mozzarella, etc.1 monthCheese, processed slices3 to 4 weeksCheese, soft such as brie, bel paese, goat1 to 2 weeksCoffee creamer, liquid refrigerated3 weeksCottage cheese2 weeksCream cheese2 weeksCream, whipping, ultrapasteurized1 monthCream, whipped, sweetened1 dayCream, half and half3 to 4 days