Wikipedia Article About Puff ball mushroom on Wikipedia Firm, round, white mushrooms that can range in size from 4 ounces to a giant 50-pounder. They have a mild, nutty flavor that complements many foods. Puffball mushrooms are available sporadically in specialty produce markets. They can be cut into thick or thin slices, breaded and sautéed, or chopped and used in a variety of dishes.