Processed cheese, process cheese, or prepared cheese is a food product made from regular cheese and sometimes other unfermented dairy ingredients, plus emulsifiers, extra salt, food colorings and/or whey.
Many flavors, colors, and textures of processed cheese exist. In the United States, the most recognizable variety of processed cheese is sold under the name American cheese, although this name also has other meanings.
The name American cheese also has a legal definition as a type of pasteurized process cheese under the U.S. Code of Federal Regulations. The Laughing Cow is another type of processed cheese, showing the international reach of this product.
Although processed cheese was first invented in 1911 by Walter Gerber of Thun, Switzerland, it was James L. Kraft who first applied for an American patent for his method in 1916. Kraft Foods also created the first commercially available sliced process cheese, which was introduced in 1950. This form of sliced cheese with its derivatives were to become ubiquitous in America, most notably used for cheeseburgers and grilled cheese sandwiches.
Source: Wikipedia
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