Given its many health properties, as well as the good flavor it provides in any meal, they make this mushroom an excellent ingredient, either as a main element or as a supplement. Quantity: 20 g (1 kg of fresh mushroom equals 100 g of dehydrated mushroom) Storage: Store in a cool, dry place. Once opened, ideal to keep them in an airtight container. Expiration: 2 years from date of packaging See expiration date. Preparation mode To rehydrate the mushrooms, immerse them in a bowl of warm water for 40 to 60 minutes. After that time, you will notice that they have grown considerably in size. Use the water resulting from rehydration to give more flavor to preparations, such as broths or sauces.