You will find the mozzarella di buffalo in good cheese shop and Italian grocery stores. As its name suggests, it's fresh mozzarella made with buffalo milk. Since 1993, the name mozzarella di campana bufula is a registered trademark, protected by the DOC label. In supermarkets, you can find fresh mozzarella in two forms: small bocconcini balls or mozzarina, a big ball much like a milky mozzarella di buffala. The mozzarina is more expensive than the small bocconcini, but much tastier.