Hollandaise sauce a blender or food processor. Temperature control is critical, as excessive temperature can curdle the sauce. Hollandaise can be frozen. Basic ingredients for the sauce are; Being a mother sauce, hollandaise sauce is the foundation for many derivatives created by adding or changing ingredients, including: Hollandaise sauce Hollandaise sauce ( or ; ), formerly also called Dutch sauce, is an emulsion of egg yolk, melted butter, and lemon juice (or a white wine or vinegar reduction). It is usually seasoned with salt, and either white pepper or cayenne pepper. Hollandaise is one of the five mother sauces in French cuisine.
French cuisine cooks' guild regulations allowed for this movement. During the 16th and 17th centuries, French cuisine assimilated many new food items from the New World. Although they were slow to be adopted, records of banquets show Catherine de' Medici (1519–1589?) serving sixty-six turkeys at one dinner. The dish called cassoulet has its roots in the New World discovery of haricot beans, which are central to the dish's creation, but had not existed outside of the New World until its exploration by Christopher Columbus. Haute cuisine (, "high cuisine") has foundations during the 17th century with a chef named La Varenne. As