Dried Shiitake Mushrooms are readily available in Chinese markets. They are reconstituted in water before using. Dried shiitake mushrooms have a wonderful “umami” flavor that makes it a great addition to a variety of dishes, from soups to dim sum and dumplings. Dried shiitake mushrooms keep in the pantry or refrigerator for a long time, but make sure they are stored in a sealed container or plastic bag so they don’t lose their smoky aroma.