Portobello, also known as large button mushroom, has a rich, earthy flavor and a firm, meaty texture. This mushroom grows in moist, nutrient-rich soil and is cultivated in controlled environments. Portobello mushrooms have a large, brown cap and a thick, sturdy stem. They are popular in many dishes because of their deep flavor and firm bite. They are easy to combine with different ingredients, making them a popular choice in both simple and elaborate recipes.