How Long Does Cornflour (Cornstarch) Last in the Fridge?
Written by Jordan Morley · Storage times from the USDA FoodKeeper database · Last updated 28 October 2026
Cornflour (Cornstarch) is a cupboard food — see the storage times below.
Storage tips for cornflour (cornstarch)
- Fridge at 0–5°C. A fridge thermometer is the cheapest food-safety upgrade — many home fridges run warmer than their dial suggests.
You can also check the calorie content of cornflour (cornstarch) alongside its safety information. Want to know exactly what's in your food? Our ingredient checker covers E-numbers, allergens and vegan status.
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Store it properly
Fridge thermometer
These storage times assume 0–5°C — check what your fridge actually runs at.
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More storage essentials
Vacuum food sealer
Removes the air that speeds spoilage — extends shelf life by days.
Check Price →Airtight glass containers
Fridge, freezer and microwave safe — one less transfer step.
Check Price →Common questions
How long does cornflour (cornstarch) last?
The FoodKeeper database gives no fridge time for cornflour (cornstarch); it is a cupboard food, good for 18–24 months. Ripe fruit and vegetables that are normally stored outside the fridge are the usual exception.
How can I tell if cornflour (cornstarch) has gone off?
Rancid or stale smells, clumping, insects, mould and bulging, leaking or rusted tins are all reasons to throw it away. Do not rely on this alone: the time guideline matters even when everything looks fine.
Can I freeze cornflour (cornstarch) to keep it longer?
Freezing is not recommended for this food; the texture tends to suffer badly. Buy or cook only what you will use in time.
Where should I store cornflour (cornstarch)?
In the cupboard, for around 18–24 months.
Related answers
Primary source: USDA FoodKeeper.
General information only, not medical advice: see the medical disclaimer. Feeling unwell after eating something? Contact NHS 111 or your GP.