Basic Roux - cooking recipe

Ingredients

1 part oil (shortening), bacon drippings, olive oil, lard or combination of these
2 parts all-purpose flour (3 parts if a thick roux is desired)

Preparation

Mix flour and oil in heavy pot.
Cook on medium heat slowly, stirring constantly.
The way I make roux takes no less than 30 minutes and up to 45 minutes.
Cook until color of dark chocolate. After you get color desired, add chopped vegetables, ie: onion, celery and bell pepper.
When onions cook clear, add cold water or stock.