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 contrôlée" (AOC) (regulated appellation) laws. French cuisine was made important in the 20th century by Auguste Escoffier to become the modern haute cuisine; Escoffier, however, left out much of the local culinary character to be found in the regions of France and was considered difficult to execute by home cooks. Gastro-tourism and the "Guide Michelin" helped to acquaint people with the rich bourgeois and peasant cuisine of the French countryside starting in the 20th century. Gascon cuisine has also had great influence over the cuisine in the southwest of France. Many dishes that were once regional have proliferated in variations