Given a choice between cultivated white mushrooms and old-fashioned brown mushrooms, also known as cremini, Italian grandmothers much prefer the plump darker ones because their flavor β’ is nuttier, richer, and more intense, their texture firmer. Portobello mushrooms are cremini mushrooms that have grown to maturity, their caps fully opening to reveal a fan of chocolate brown gills. To clean mushrooms, use a moist soft brush. Donβt even think of washing them, because they soak up water like a sponge.