Storage and Preparation
Mushrooms are best used within five days of purchase. To prolong storage time, place bulk mushrooms in a paper bag in the refrigerator immediately. Fresh mushrooms need to be handled carefully or bruising may occur. Don't put heavy materials on top of the mushrooms in the fridge.
Never store mushrooms in an airtight container or plastic bag. It will gather moisture, which will eventually lead to spoilage of the product.
To clean mushrooms, rinse quickly with cold water. After rinsing, the only trimming they may need is to cut off the end of the stem if it is dry. You do not need to peel mushrooms.
There are two main ways to freeze mushrooms. To freeze them raw, clean desired amount of fresh mushrooms to remove dirt. Place on a baking tray and open-freeze as quickly as possible. When mushrooms are frozen, place in containers and put them back in the freezer.
First, sauté them in butter, oil, or in a nonstick skillet without fat, let them cool slightly, and freeze them in an airtight container for up to one month.
Look for mushrooms that have a fresh, smooth appearance and are free from major blemishes. A closed veil indicates a delicate flavour; an open veil means a richer flavour, but often means they are older and less fresh.
If you are just using the caps of your mushrooms, simply twist out the stems or remove them with the tip of a knife.
To preserve the whiteness of sliced button mushrooms (for a salad or dipping tray, etc), dip them in lemon juice.