Roux
Roux is used to thicken sauces.
Ingredients:
3 parts all purpose flour
2 parts butter (instead of butter, use rendered fat for extra flavor)
Method:
Heat the butter over medium heat, add the flour while continuously stirring to combine. Roux is used in 4 colors, white, blonde, brown and dark. To achieve the desired color, continue cooking on medium heat while stirring the roux.