Dried white fungus offers a soft and gelatinous texture after soaking, perfect for soups and sweet desserts. 1. How do I rehydrate white fungus? Soak in cold water for 2 hours until it absorbs sufficient water to expand and returns to a semi-translucent state. How can I cook white fungus to best extract its gelatinous essence? After rehydrating and washing the white fungus, tear it into small pieces. Bring to a boil over high heat, then reduce the heat to a low simmer and cook for 1 hour. 2. How should white fungus be stored after opening to maintain its freshness? Once opened, please store the white fungus in a cool, dry place away from direct light.