Shelf Life Tips
- How long does cornstarch last? The precise answer depends to a large extent on storage conditions — to maximize the shelf life of cornstarch, store in a cool, dark cupboard, away from direct heat or sunlight.
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To maximize the shelf life of cornstarch, keep the package tightly sealed after opening.
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Properly stored, cornstarch will stay safe indefinitely without a loss of quality.
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Is cornstarch safe to use after the "expiration" date on the package? Yes, provided it is properly stored and the package is undamaged — commercially packaged cornstarch may carry a "Best By," "Best if Used By," "Best Before," or "Best When Used By" date but this is not a safety date, it is the manufacturer's estimate of how long the cornstarch will remain at peak quality.
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Does cornstarch ever spoil? No, commercially packaged cornstarch does not spoil and will remain safe provided it has been stored properly.
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