Fresh mushrooms should be stored in the refrigerator in a paper bag. If you buy them packaged, leave them as is but transfer them to a paper bag once opened so they last longer.
They are best if used within a few days of purchase but can be kept for a week or longer.
Finally, do not wash mushrooms until you are ready to use them.
If you aren’t able to use your mushrooms within a week, sauté and freeze them for later use. Do not try to freeze fresh raw mushrooms because they will be gross.
Dried mushrooms should be stored in a tightly sealed container in either the refrigerator or freezer for up to one year.