Processed cheese was first developed commercially in the United States during the early part of this century and is now widely produced all over Western Europe and North America.
Cheese is processed by grinding and mixing together one or several types of natural cheese, heating, then adding emulsifying agents. This makes the cheese uniform in texture although it also diminishes the flavour. The molten cheese is then stored in sealed moulds.
Processed cheese has several points in its favour: it is slightly cheaper to buy and it may be kept for a much longer period of time than natural cheese.