Hollandaise sauce One of his categories was "allemande", which was a stock-based sauce using egg and lemon juice. Escoffier replaced "allemande" with "hollandaise" in his list of the five mother sauces of haute cuisine. While many believe that a true hollandaise sauce should only contain the basic ingredients of eggs, butter and lemon, Prosper Montagne suggested using either a white wine or vinegar reduction, similar to a Béarnaise sauce, to help improve the taste. In English, the name "Dutch sauce" was common through the nineteenth century, but was largely displaced by "hollandaise" in the twentieth. As in other egg emulsion sauces, like
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