Rinse chicken in cold water and dry with paper towel (inside and outside). To keep the chicken cooking evenly, you’ll need to flip the wing tips under the chicken and tie the legs together. You can also cut a small hole in the skin next to the end of the drumstick. Insert the drumstick tip through the hole.
Disconnect the breast meat from the skin by gently rubbing your fingers between the breast and the skin. Rub duck fat and thyme between the breast meat and skin. Season with salt. Place your chicken on a rack in a shallow baking dish. Refrigerate for four to 24 hours.
Preheat oven to 425 degrees. Let your chicken rest for 30 minutes at room temperature. Bake until your chicken reaches a temperature of 160 degrees, internal temperature will rise to 165 degrees while it rests. This will take 45 minutes to an hour.