Prime Rib Roast With Mustard Horseradish Sauce

Recipe by Jeff Hixson
READY IN: 1hr 30mins




  • Two hours before roasting, remove the meat from the refrigerator and allow it to come to room temperature.
  • Preheat the oven to 500 degrees F (see note).
  • Place the oven rack on the second lowest position.
  • Place the roast in a pan large enough to hold it comfortably, bone-side down, and spread the top thickly with the salt and pepper.
  • Roast the meat for 45 minutes.
  • Without removing the meat from the oven, reduce the oven temperature to 325 degrees F and roast for another 30 minutes.
  • Finally, increase the temperature to 450 degrees F and roast for another 15 to 30 minutes, until the internal temperature of the meat is 125 degrees F.
  • (Be sure the thermometer is exactly in the center of the roast.) The total cooking time will be between 1 1/2 and 1 3/4 hours.
  • Meanwhile, make the sauce.
  • Remove the roast from the oven and transfer it to a cutting board.
  • Cover it tightly with aluminum foil and allow the meat to rest for 20 minutes.
  • Carve and serve with the sauce.
  • Note: Be sure your oven is very clean before setting it at 500 degrees F.
  • For Mustard horseradish sauce: Whisk together the mayonnaise, mustards, horseradish, sour cream, and salt/pepper in a small bowl.