Shiitake Mushrooms Dried - 1 lb/454 gr, USA. Ingredients: Shiitake Mushrooms (em> Lentinula Edoles). Preserve dried mushrooms in an airy bag in a dry room. Instructions: Soak in lukewarm water for 15 minutes. Drain, then dip in boiling water for another 10 minutes. Place in colander and rinse thoroughly. 1 lb of dried mushrooms equals 10 lb of fresh wild mushrooms. Great for a gourmet mushrooms gift.