Stir in the flour and add the milk, stirring constantly until gravy starts to thicken. Add Kitchen Bouquet for color (opt) and if not as thick as you would like stir 4-tbls flour into a cup of hot water and stir until flour absorbed. Then slowly add to your gravy as much as you need. Be careful of adding too much because then you will need to add more milk! Salt and pepper again if needed.