Romano cheese is a type of cheese that is known for being very hard, salty and sharp. It is one of the oldest Italian cheeses. It is usually grated. It is different from normal cheeses because it requires more milk per pound, most water being lost in the process. There are different types of romano cheese. True romano cheese is made from sheep's milk (pecorino romano) or goat's milk (caprino romano), though mass produced versions, as in the United States, are often made from cow's milk (vacchino romano). Pecorino romano is sharp and tangy. Caprino romano, the goat's milk version, has an extremely sharp taste.