Pour the drippings from the roasting pan into a small pot, simmer for 10-15 minutes, skim off most of the fat, not all of it as that is what adds flavor, and use a slotted spoon to remove any celery, onion, or any large pieces.

If you boiled the neck, heart, and gizzard (not the liver), then use 1/4 cup of that broth, and mix with the flour in a small bowl. If you did not boil these, then use water or chicken stock. Whisk this into the drippings until smooth and continue to simmer, low simmer would be best. Stir occasionally and this will thicken, cook to your desired consistency, add salt and pepper to your taste and pour into a serving dish, serve with your roast turkey and mashed potatoes.