Guides › How long does food last › Cornstarch
How long does cornstarch last?
Cornstarch keeps for about 18 to 24 months in the pantry. Counted from the date of purchase.
| Where | How long |
|---|---|
| Pantry | 18 to 24 months |
| Pantry, after opening | 18 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 Baked Goods / Baking and Cooking.
How Known uses thisWhen a receipt lists cornstarch, 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 Baked Goods
Commercial bread products, including pan breads, flat breads, rolls, and buns14 to 18 daysCommercial cakes and muffins3 to 7 daysCheesecake3 to 6 monthsCookies, soft2 to 3 monthsCookies, crispy4 to 6 monthsDairy filled eclairs3 monthsDoughnuts1 to 2 daysFruit cake6 monthsPastries, danish5 to 10 daysCream pies, banana cream, coconut cream, butterscotch—Chiffon pies, chocolate, lemon—Fruit pies, apple, peach, blueberry, apricot, cherry, blackberry1 to 2 days