Shelf Life Tips
- How long does baking powder last once opened? The precise answer to the question depends to a large extent on storage conditions; store in cool, dry area.
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To maximize the shelf life of opened baking powder, keep the package tightly sealed after opening.
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How long does opened baking powder last at room temperature? Properly stored, opened baking powder will generally stay at best quality for about 6 months.
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Is baking powder safe to use after the "expiration" date on the package? Yes, provided it is properly stored and the package is undamaged — commercially packaged baking powder will typically 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 baking powder will remain at peak quality.
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How can you tell whether opened baking powder is still good to use? 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.
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