Flour mixture is a term used to describe a combination of flour and other ingredients that are used in baking. The two most common flour mixtures are DOUGH and roux. DOUGH is a thick, malleable mixture of flour, water, and other ingredients that is used to make breads, pastries, and other baked goods. Roux is a mixture of equal parts fat and flour that is used as a thickening agent for sauces, soups, and gravies.