How to Store Mushrooms
Maximizing the shelf life of mushrooms is all about balancing air circulation with moisture retention.
Loose Mushrooms: Store in a partially open zipper-lock bag, which maximizes air circulation without drying them out. Leaving the bag slightly open allows ethylene gas emitted from the mushrooms to be released, prolonging their shelf life.
Packaged Mushrooms: Store in their original containers, which are designed to “breathe,” maximizing the mushrooms’ shelf life by balancing the retention of moisture and the release of ethylene gas. If you open a sealed package of mushrooms but don’t use all the contents, rewrap the remaining contents in the box with plastic wrap and poke a few holes in the plastic wrap to allow moisture to escape.
DON’T wrap mushrooms in a paper bag or cover them with a damp paper towel, as many sources suggest. Both techniques speed up their deterioration.