Most fresh mushrooms last about one week in the fridge when stored properly. 2. Cleaning and Preparation

Remove mushrooms from plastic wrapping immediately. Store them unwashed in an open paper bag in the refrigerator; the paper absorbs excess moisture and prevents them from becoming slimy.

Mushrooms are culinary "sponges" that require specific handling to achieve their best flavor and texture. Because they are roughly 80–90% water, the primary goal of preparation is to manage moisture.

Rinse quickly under cold running water just before cooking, then spin them dry in a salad spinner or pat them thoroughly with a towel.