To cook a boneless prime rib to rare perfection, preheat your oven to 450 degrees Fahrenheit. Place the roast in a roasting pan and roast for 15 minutes. Then reduce the heat to 325 degrees and continue roasting for about 1 hour and 15 minutes, or until the internal temperature reaches 120 degrees. Let the roast rest for 15-20 minutes before slicing.
If you prefer your boneless prime rib cooked to medium doneness, follow a similar cooking method. Start by preheating your oven to 450 degrees Fahrenheit and roast the prime rib for 15 minutes. Then lower the heat to 325 degrees and continue cooking for approximately 1 hour and 30 minutes, or until the internal temperature reaches 135 degrees. Allow the roast to rest for 15-20 minutes before carving.
For Well-Done Boneless Prime Rib
For a well-done boneless prime rib, preheat your oven to 450 degrees Fahrenheit and roast the prime rib for 15 minutes. Reduce the heat to 325 degrees and continue roasting for about 1 hour and 45 minutes, or until the internal temperature reaches 150 degrees. Let the roast rest for 15-20 minutes before slicing and serving.