Airtight Container: Place the cooled mushrooms in an airtight container. If you have multiple layers, use parchment paper between them to prevent sticking.
Refrigeration: Store the container in the refrigerator if you plan to eat them within a few days. They should stay fresh for about 3-5 days.
Freezing: If you want to keep them longer, you can freeze them. Spread the mushrooms in a single layer on a baking sheet and freeze until solid. Then transfer them to a freezer bag or container. They can last up to 2-3 months in the freezer.