Remove the prime rib from the refrigerator for at least 30 minutes before bringing it to room temperature. Preheat the oven to 450 degrees.
In a small bowl mix butter, garlic, thyme, oregano, rosemary, salt and pepper. Rub all of the butter on the outside of your prime rib and place in a roasting pan or large skillet with the fat side up.
Cook for 15 minutes and reduce the temperature to 325 degrees. It is about 15 minutes per pound of meat. Bake until it reaches an internal temperature of 110 degrees.
Remove the prime rib from the oven and let it rest with foil for at least 20 minutes. The temperature will be 130 degrees Fahrenheit for a medium rare prime rib.
