Pour turkey drippings from Roasted Butter Herb Turkey into a large container and let cook slightly. Skim fat from drippings and reserve.
In a large saucepan over medium heat, make a roux by combining 2 tablespoons of the skimmed fat and 2 tablespoons of flour. Cook until mixture is a beige color. Slowly whisk in 2 cups of turkey drippings (substitute chicken broth if short on drippings or if a thinner consistency is desired) Stir in 1 teaspoon of poultry seasoning. Over medium-high heat, bring to a boil, stirring constantly until gravy is desired consistency. Remove from heat. Season with salt and pepper, to taste.