Blue cheese of blue veins. The distinctive flavor and aroma of blue cheese arises from methyl ketones (including 2-pentanone, 2-heptanone, and 2-nonanone) which are a metabolic product of "Penicillium roqueforti". These compounds are not formed in other types of cheese fermented by bacterial acidification alone. In the European Union, many blue cheeses, such as Cabrales, Danablu, Gorgonzola, Roquefort and Blue Stilton, carry a protected designation of origin, meaning they can bear the name only if they have been made in a particular region. Similarly, individual countries have protections of their own such as France's Appellation d'Origine Contrôlée and Italy's Denominazione di Origine
Saint-Félicien cheese Saint-Félicien cheese Saint-Félicien is a cow's milk cheese produced in the Rhône-Alpes region of France. In France, it is designated a "dauphinois" cheese, referring to the former French province Dauphiné where it originated. It is a close cousin of another dauphinois cheese, Saint-Marcellin, and bears a similar texture and taste, though it can be almost twice as large in diameter. The name originates from the small town where the cheese was first produced and sold. It was originally made from goat's milk, but since then it has become more common to produce it with cow's milk. Its creamy interior is