Whether you can safely eat mushrooms after their best before date depends on the type of mushroom and how it has been stored.
Fresh Mushrooms: Raw mushrooms typically last 3–7 days in the fridge if stored properly—wrapped in paper towels and placed in a paper bag on a fridge shelf.[1] If your fresh mushrooms are past their best before date, inspect them carefully: avoid mushrooms that are slimy, have dark spots, or emit an off odor, as these can be signs of spoilage. Eating spoiled mushrooms can result in foodborne illness, so if in doubt, it is better to discard them.[2] Proper refrigeration in breathable packaging is crucial, as airtight containers can encourage the growth of harmful bacteria like those causing botulism.[2]
Dried Mushrooms: Dried mushrooms do not technically expire and can be consumed after the best before date if they were stored in sealed packaging, show no signs of mold, sour smell, or abnormal texture.[3] The primary concern with dried mushrooms past their date is the potential loss of flavor and aroma, not safety, as long as there is no visible deterioration.
Canned/Jarred Mushrooms: Manufacturers generally advise against eating canned or jarred mushrooms past their best-by date, even though the actual shelf life might extend beyond that if the can is undamaged and storage has been consistent.[5] Once opened, use them within a few days and check for any unpleasant odor, discoloration, or texture changes before consuming.
Bottom Line: The best before date is a guideline for quality rather than safety, especially for dried and some preserved mushrooms. Always assess the appearance, smell, and texture before eating mushrooms past this date, and discard them if there are any signs of spoilage.
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