Frozen mushrooms are fresh mushrooms that are rapidly cooled and frozen. Due to the rapid freezing, many nutrients in fresh mushrooms are maintained. Mushrooms are the fruit caps and stipes of the edible fungus Basidiomycetes, which belongs to the subphylum Agaricaceae. Usually together with oyster mushrooms, straw mushrooms, and shiitake mushrooms, they are called the “four major edible fungi” that are beneficial to the human body. The meat is thick, crisp, and tender, with a strong fragrance and the best quality.