Mushroom/ˈmʌʃrʊm/ Definition 1 of 4Pro Tip 1/3Edible Varieties Some mushrooms are edible and prized for their taste, but others can be poisonous. Morel mushrooms are a safe and delicious choice for foraging. Pro Tip 2/3Culinary Use Mushrooms are used in various cuisines worldwide and can be prepared in many ways. Button mushrooms are commonly used in stir-fries. Pro Tip 3/3Vegetarian Ingredient Mushrooms are often used in vegetarian dishes as a meat substitute due to their texture. Portobello mushrooms make great vegetarian burgers.