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FOOD STORAGE — HOW LONG CAN YOU KEEP...

BAKING POWDER — OPENED PACKAGE

Pantry Refrigerator
Blue Arrow Green Arrow 6 months
Tips
  • The precise answer to the question “How long does baking powder last once opened?” depends to a large extent on storage conditions — store in cool, dry area and keep package tightly closed.
  • Time shown is for best quality only — in most cases, opened baking powder will not spoil, but it will lose its potency over time and not perform as intended.
  • To test whether opened baking powder is still potent enough to be effective: add one teaspoon of baking powder to one-third cup of hot water — if mixture bubbles, the baking powder is still potent enough to use.
  • “Best By,” “Best if Used By,” and “Use By” dates on commercially packaged foods sold in the United States represent the manufacturer's estimate of how long the product will remain at peak quality — in most cases, the opened baking powder will still be safe to consume after that date, although it will lose potency over time.

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

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