While many recommend brushing off dirt with a damp paper towel or pastry brush to avoid "waterlogging," testing shows that a quick rinse only increases mushroom weight by about 2%.
Trim the very bottom of the stems. Keep mushrooms whole, quartered, or sliced depending on the recipe, but remember that smaller pieces release moisture faster. 3. Essential Cooking Techniques MUSHROOMS
Look for caps that are firm and whole with an even texture. Avoid mushrooms that are withered, damp, or slimy, as these signs indicate they are past their prime. While many recommend brushing off dirt with a
Rinse quickly under cold running water just before cooking, then spin them dry in a salad spinner or pat them thoroughly with a towel. Rinse quickly under cold running water just before
To avoid "rubbery" or "soggy" mushrooms, use methods that drive off moisture before browning begins. How To Cook Mushrooms - Michael Ruhlman