Set the roaster oven (with the lid on) to the highest temperature available.
Remove the neck and giblets from the turkey cavity. (Set aside for giblet gravy or discard.)
Dry off the turkey with paper towels.
Loosen the skin over the turkey breast by sliding your hand between the meat and skin. Rub half of the butter mix underneath the skin of the breast.
Rub the other half of the butter over the outside of the bird.
Sprinkle the outside of the bird with salt and pepper.
Put 1/4 cup butter in the cavity of the turkey along with 1 tsp each of salt and pepper.
Place the turkey in the preheated roaster and cook at the highest temperature for 30 minutes.
Without opening the lid, turn down the temperature to 325 degrees and roast until the turkey tests done (at least 165 degrees in the thickest part of the thigh).
The exact timing will depend on whether the turkey is stuffed or unstuffed and how large the turkey is. Plan for about 15 minutes per pound for an unstuffed turkey.