Portobello is a brown champignon that has grown to its fully mature size. Due to its cup being fully open, the mushroom looses some moisture, condenses the flavour and becomes rich in taste. Its firm texture makes portobello a favourite choice among most vegetarians. One portobello mushroom contains more potassium than a banana! Portobello mushrooms contain vitamin D, copper, selenium, potassium, phosphorus, vitamin B6, and niacin. They are great for BBQ, grill, pasta, burgers, omelette