Cremini mushrooms are small brown mushrooms, similar to white button mushrooms that are available year round and are frequently sold in stores as Baby Bella mushrooms. They are infact the same strain as Portabella. The flavor is similar to a portabella and is much more than its white relative. The texture is meaty and the flavor quite earthy. These serve as a good introduction to mushroom for someone who has never eaten mushrooms. Nutritionally, Cremini mushrooms are rich in protein, fiber, Vitamins B, D and K and several minerals.