Pour chicken broth into roasting pan
Add onion powder and black pepper to roasting pan
Using a wisk, mix the contents of the pan completely
Add 2 tablespoons of the flour
Wisk contents thoroughly
Add 2 more tablespoons of the flour
Wisk completely
Add final 2 tablespoons of the flour
Wisk until gravy is a creamy consistency
Pour gravy into gravy boat or serving bowl