Shelf Life Tips
- How long does an opened package of active dry yeast last? The precise answer depends to a large extent on storage conditions - store opened dry yeast in the refrigerator or freezer.
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To maximize the shelf life of active dry yeast once the package is opened, transfer yeast to a covered airtight container or place original yeast package in a resealable plastic freezer bag.
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Is active dry yeast safe to use after the "expiration" date on the package? Yes, provided it is properly stored and the package is undamaged - commercially packaged active dry yeast 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 active dry yeast will remain at peak quality.
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How long does active dry yeast last in the fridge? Active dry yeast will maintain best quality for about 4 to 6 months in the refrigerator.
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How long does active dry yeast last in the freezer? Properly stored, it will maintain best quality for about 10 to 12 months, but will remain safe beyond that time.
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The freezer time shown is for best quality only — active dry yeast that has been kept constantly frozen at 0° F will keep safe indefinitely.
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How can you tell if active dry yeast is still good to use? To test whether yeast is still potent enough to be effective: Add 1 teaspoon sugar to 1/4 cup warm water and stir in 1 envelope (or 2 1/4 teaspoons) of yeast; let stand 10 minutes — if the yeast foams up to the 1/2 cup mark, it will still be effective.
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Sources: For details about data sources used for food storage information, please click here
