Store in a sealed container at cool temperature or refrigerate; one ounce will expand to approximately four ounces after rehydrating. Unrinse dried mushrooms; allow to soak in hot water for 15-20 minutes prior to utilization. Filter through paper towels, cheesecloth, or a paper coffee filter, discarding any debris. Blend the soaking liquid with sauces, risotto, and soups. Slice softened mushrooms and combine with your dish.