Roux Roux Roux () is flour and fat cooked together and used to thicken sauces. Roux is typically made from equal parts of flour and fat by weight. The flour is added to the melted fat or oil on the stove top, blended until smooth, and cooked to the desired level of brownness. Butter, vegetable oils, bacon drippings or lard are commonly used fats. Roux is used as a thickening agent for gravy, sauces, soups and stews. It provides the base for a dish, and other ingredients are added after the roux is complete. The fat is most often butter in
Sponge cake places where European patisserie has spread, including the Anglo-Jewish "plava", Italian génoise, the Portuguese pão-de-ló, and the possibly ancestral Italian "pan di Spagna" ("Spanish bread"). Derivatives of the basic sponge cake idea include the American chiffon cake and the Latin American tres leches cake. The essential ingredients are eggs, fat (often butter), sugar, and flour. An authentic British sponge cake is made by first mixing the fat with the sugar and then beating the eggs with the sugar-fat mix until the mixture is light and creamy, then carefully sieving and folding in the flour. Depending on the recipe, the flour