Mushrooms can be eaten raw or cooked. Ordinary white mushrooms are grown in pasteurized compost, so need only wiping. If very dirty, rinse briefly. Do not soak them or they will become soggy. Button mushrooms can be left whole or halved, larger ones may be sliced or chopped.
Trim off the woody ends of the stalks with a small knife. Save the trimmings for use in stocks and soups.
Wipe the mushrooms gently with dump paper towels, removing any compost still clinging to them.
Slicing
Put the mushrooms stalk-side down on a cutting board. Slice lengthwise with a chefβs knife.