Mix all ingredients for the oil mixture and set aside.
Mix all ingredients for the butter mixture and set aside.
Add 1 tbsp flour to the oven bag, shake to coat the inside, and place it in your roasting pan.
Rinse the turkey under cold water, pat dry, and separate the skin from the meat.
Spread the butter mixture under the skin.
Place the turkey inside the oven bag and pour the oil mixture over it.
Rub to coat all exposed skin.
Seal the bag, ensuring room for air, and refrigerate for 2 hours before cooking.