Shiitake mushrooms, Japanâs most popular mushroom, have a strong, earthy smell and are used fresh or dried in cooking. The Dynasty brand shiitake mushrooms are dried and can be conveniently used for your cooking needs. When the mushrooms are dried, their guanylate content increases, while the drying process allows concentration and provides glutamate, thus boosting their umami flavor. Fresh shiitake mushrooms are abundant in glutamate. Dried shiitake mushrooms are re-hydrated and mainly used for...