Ricotta is an Italian whey cheese made from sheep, cow, goat or Italian Water Buffalo whey left over from the production of other cheeses. Like other whey cheeses. Ricotta curds are creamy white in appearance, and slightly sweet in taste. The fat content changes depending on the brand and the type of milk used. In this form, it is somewhat similar in texture to some cottage cheese variants, though considerably lighter. It is highly perishable. However, ricotta also is made in aged varieties which are preservable for much longer.