Processed cheese Arnold Nawrocki was assigned to Clearfield Cheese Co. in 1956. The best known processed cheese in the United States is marketed as American cheese by Kraft Foods, Borden, and other companies. It is orange, yellow, or off-white; mild, with a medium consistency; and melts easily. It is typically made from a blend of cheeses, most often Colby and cheddar. Another type of processed cheese created in the United States is Provel pasteurized processed pizza cheese, which uses cheddar, Swiss, and provolone cheeses as flavorants. Provel cheese is commonly used in St. Louis-style pizza. A third variety of processed pizza cheeses
Cheese matrix that is broken down by heat. When enough protein bonds are broken, the cheese itself turns from a solid to a viscous liquid. Soft, high-moisture cheeses will melt at around , while hard, low-moisture cheeses such as Parmesan remain solid until they reach about . Acid-set cheeses, including halloumi, paneer, some whey cheeses and many varieties of fresh goat cheese, have a protein structure that remains intact at high temperatures. When cooked, these cheeses just get firmer as water evaporates. Some cheeses, like raclette, melt smoothly; many tend to become stringy or suffer from a separation of their fats.