Other names: portobella, portabella, brown crimini. Cremini mushrooms
A brown crimini mushroom is the same thing as a portobella (portabella, portabello). When recipes call for crimini mushrooms they are usually referring to the smaller (around 2") mushrooms and if your recipe refers to portabella mushrooms look for the very large fungus (around 4 - 6" in diameter). For more information on this mushroom click the "read more" link.