Flat dark open mushroom, good for roasting, baking and stuffing. Portabello mushrooms are large mushrooms which are tan with a dark underside. They are low in calories, fat free and a rich source of copper, selenium, and niacin. Portabello mushrooms are actually the mature form of baby Crimini mushrooms so they offer the same health benefits.
Agaricus bisporus is an edible basidiomycete mushroom native to grasslands in Europe and North America. It has two color states while immature—white and brown—both of which have various names. When mature, it is known as portobello mushroom.
When immature and white, this mushroom may be known as common mushroom, button mushroom, cultivated mushroom, table mushroom, crimini mushroom and champignon mushroom. When immature and brown, it may be known variously as Swiss brown mushroom, Roman brown mushroom, Italian brown mushroom, cremini/crimini mushroom, or chestnut mushroom.
A. bisporus is cultivated in more than seventy countries, and is one of the most commonly and widely consumed mushrooms in the world.