To begin, prepare the turkey. Trim off excess skin and fat, including the tail, neck, and giblets.
15 lb Turkey
In a small bowl, combine the paprika, both peppers, onion powder, garlic powder, salt, and cayenne. Mix until well combined.
1 Tablespoon Salt, 1 Tablespoon Paprika, ½ Tablespoon Black pepper, ½ Tablespoon White pepper, ½ Tablespoon Garlic powder, ½ Tablespoon Onion powder, 1 teaspoon Cayenne
Melt the butter. Combine half of the seasoning mixture (about 2 tablespoons + ½ teaspoon) and the melted butter, and mix well.
2 sticks Salted butter
Pour the butter and seasoning mixture into a meat injector, then inject the breast of the turkey with butter. This is best done by puncturing the breast deeply, then injecting a bit and nearly removing the needle. Without entirely removing it, adjust the direction of the tip and inject more until both breasts are seasoned and the butter has been used up.
Use half the remaining dry seasoning to rub on the outside of each turkey breast. Then let the turkey rest overnight in the fridge, uncovered, to dry brine.
Once the turkey has brined, preheat the oven to 325°F. Place the turkey on top of a rack in a large roasting pan or rimmed baking sheet, and bake for 10 minutes per lb of turkey (I cooked my 15 lb turkey for 2½ hours) or until the internal temperature reaches 160°F. This is the most important part!
About 15 minutes before the turkey is finished in the oven, start preheating the oil in a very large deep fryer. The oil is ready at 350°F.
28 quarts Vegetable oil
Remove the turkey from the oven. Lift it and tilt it to gently drain all excess juice from the cavity back into the pan. Once it's no longer dripping at all, place it gently into the fryer basket and pat it gently dry. The turkey must be completely dry before frying.
Slowly and gently place the basket into the oil, then fry for about 5-10 minutes, until the skin is a deep orange-red.
Remove the turkey, and allow it to rest for 15 minutes to cool. Sprinkle the remaining seasoning over the entire turkey, then slice, serve, and enjoy!