A generic name given to a variety of different mushrooms that have a white color such as the button mushroom and the cup mushroom. They have a mild flavor and are easy to find in supermarkets because they are grown commercially. To store, keep refrigerated loosely wrapped in their original container or a paper bag at 34ºF to 38ºF where they can be kept for 5 to 7 days. Do not place mushrooms in a plastic bag in order to keep them from being exposed to excessive moisture.