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Food Storage - How long can you keep...

CORNSTARCH — UNOPENED OR OPENED PACKAGE

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Keeps indefinitely

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.
  • To maximize the shelf life of cornstarch, keep the package tightly sealed after opening.
  • Properly stored, cornstarch will stay safe indefinitely without a loss of quality.
  • 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.
  • Does cornstarch ever spoil? No, commercially packaged cornstarch does not spoil and will remain safe provided it has been stored properly.

Sources: For details about data sources used for food storage information, please click here

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