Processed cheese is sometimes sold in blocks, but more often sold packed in individual slices, with plastic wrappers or wax paper separating them.
Due to the processing and additives, some varieties cannot legally be labeled as "cheese" in many countries, including the United States and Britain, and so are sold as "cheese food", "cheese spread", or "cheese product", depending primarily on the amount of cheese, moisture, and milkfat present in the final product.
In the United States processed cheese is defined, categorized, and regulated by the Food & Drug Administration under the U.S. Code of Federal Regulations Title 21 (Food and Drugs), Section 133 (Cheeses and Cheese Related Products)[3]. Pasteurized process cheese can be made from a single cheese or a blend of several cheeses. Cream, milkfat, water, salt, artificial color, and spices may also be added. The mixture is heated with an emulsifier, poured into a mold, and then allowed to cool. The definitions include:
* Pasteurized process cheese. (Includes "American Cheese"[1] and "Pasteurized process American cheese"[1])
* Pasteurized process cheese food
* Pasteurized process cheese spread (e.g. Velveeta)
* Pasteurized process cheese product
The various definitions are mainly used to distinguish minimum/maximum amounts of cheese ingredient, moisture content, and milkfat.