Onion sauce Onion sauce Onion sauce is a culinary sauce that uses onion as its primary ingredient. Some onion sauces may use several types of onions in their preparation. Some onion sauces are brown in color, while others are white. Many various ingredients may be used in preparations of onion sauce, such as cream, milk, butter, chicken broth, wine, port wine, beer, lemon juice, flour, salt, pepper, cayenne pepper, nutmeg, dry mustard, sage and other herbs, mushroom ketchup, bread crumbs, bacon and others. Preparation generally involves slicing or dicing and then cooking the onions, adding additional ingredients, and then continuing to cook
Espagnole sauce new sauce was an instant success, and was gratefully named in honor of its creators." In "Kettner's Book of the Table", published in 1877, an entirely different explanation is given: The name "Kettner" in the title refers to Auguste Kettner, former chef to Napoleon III, who emigrated to England and in 1867 opened a restaurant in Soho—"Kettner's"—one of the oldest restaurants in London. Espagnole sauce Espagnole sauce () is a basic brown sauce, and is one of Auguste Escoffier's five mother sauces of classic French cooking. This sauce was already compiled in different Spanish cooking handbooks of the late 19th