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
Rumi cheese Rumi cheese Rumi cheese ( ' , also known as ' in Alexandria) is one of the main types of cheese in Egypt. It has a pungent smell, and different degrees of saltiness depending on the age. Rumi is thought to be derived from the Greek kefalotyri cheese. It is the main hard cheese in Egypt. It belongs to the same family as "Pecorino Romano" and "Manchego". Rumi cheese is made from cows' milk, or from a mixture of cow and buffalo milk. No starter culture is used. The milk is natural, with full cream. Peppercorns may be added. After