[h1]Roux[/h1]
A roux is a general term for a variety of flour bindings. A roux can be white, brown or blond, made according to the cooks intended use and ingredients.

Normally equal amounts of butter/fat and flour are used.

Example: Melt one tablespoon of butter in a pan, and the same amount of flour is added, stirring well. This roux will require 2 cups of liquid.
                                              More thoughts on Roux : Making a rhu? (roux)