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 Louis XV. This recipe is still popular today, as are other recipes from Queen Marie Leszczyńska like consommé à la Reine and filet d'aloyau braisé à la royale. Queen Marie is also credited with introducing lentilles to the French diet. The French Revolution was integral to the expansion of French cuisine, because it abolished the guild system. This meant anyone could now produce and sell any culinary item he wished. Bread was a significant food source among peasants and the working class in the late 18th century, with many of the nation’s people being dependent on it. In French provinces,