Hollandaise sauce mayonnaise and Béarnaise, the egg does not coagulate as in a custard; rather, the lecithin in the eggs serves as an emulsifier, allowing the mixture of the normally immiscible butter and lemon juice to form a stable emulsion. To make hollandaise sauce, beaten egg yolks are combined with butter, lemon juice, salt, and water, and heated gently while being mixed. Some cooks use a double boiler in order to control the temperature. Some recipes add melted butter to warmed yolks; others call for unmelted butter and the yolks to be heated together; still others combine warm butter and eggs in
French cuisine central figure to the modernization of haute cuisine and organizing what would become the national cuisine of France. His influence began with the rise of some of the great hotels in Europe and America during the 1880s – 1890s. The Savoy Hotel managed by César Ritz was an early hotel in which Escoffier worked, but much of his influence came during his management of the kitchens in the Carlton from 1898 until 1921. He created a system of "parties" called the brigade system, which separated the professional kitchen into five separate stations. These five stations included the "garde manger" that