Overview
A cordon bleu or schnitzel cordon bleu is a dish of meat wrapped around cheese (or with cheese filling), then breaded and pan-fried or deep-fried.
Veal or pork cordon bleu is made of veal or pork pounded thin and wrapped around a slice of ham and a slice of cheese, breaded, and then pan-fried or baked. For chicken cordon bleu, chicken breast is used instead of veal. Ham cordon bleu is ham stuffed with mushrooms and cheese.
Name
The French term is translated as "blue ribbon". According to Larousse Gastronomique, the "was originally a wide blue ribbon worn by members of the highest order of knighthood, L'Ordre des chevaliers du Saint-Esprit, instituted by Henri III of France in 1578. By extension, the term has since been applied to food preparation to a very high standard and by outstanding cooks. The analogy no doubt arose from the similarity between the sash worn by the knights and the ribbons (generally blue) of a cook's apron."
History
The origins of cordon bleu as a schnitzel filled with cheese are in Brig, Switzerland, probably about the 1940s, first mentioned in a cookbook from 1949. The earliest reference to "chicken cordon bleu" in The New York Times is dated to 1967, while similar veal recipes are found from at least 1955.
From Wikipedia (CC BY-SA 4.0).