Roux is used to thicken a broth, sauce or gravy. It is a substance created by
cooking flour and fat, traditionally butter, in equal amounts. In Cajun cuisine, roux is made with bacon fat or oil instead of butter and dark brown in color, which lends much richness of flavor, albeit less thickening power. Central European cuisine uses lard (in its rendered form) or more recently vegetable oil instead of butter for the preparation of roux. Light (or “white”) roux provides little flavor other than a characteristic richness to a dish, and is used in French cooking and some gravies or pastries throughout the world. Darker roux is made essentially by cooking the roux longer. Darker roux, sometimes referred to as “blond”, “peanut-butter”, “brown” or “chocolate” roux depending on the color achieved, add a distinct nutty flavor to a dish
I use roux to thicken my soups where necessary, such as for Ham and Bean soup, I also use it in stews to thicken the broth or gravy. I use butter, the butter will darken the longer you cook it with the flour, I usually pull it off the heat just as it is turning light brown.
Always start with an equal amount of butter and flour. Melt ¼ cup butter in a saucepan, add ¼ cup flour. Melt the butter over medium heat; slowly add the flour to the butter, whisking constantly. Within 2 to 3 minutes the roux will have a consistency of a cake frosting. A white roux is done when the flour loses its “raw” smell and begins to develop a toasty aroma. If you desire a darker roux cook longer, stirring constantly, until the desired color.
If you’re not adding liquid, or adding to liquid immediately remove the pan from the heat and transfer the roux to another container to cool. Be very careful: the hot fat-flour mixture can cause painful burns. Refrigerated or frozen roux will keep well for up to two months and can be added directly to soups or sauces for quick thickening. Increase your recipe and you can freeze your roux in ice cube trays for future use.






