Perfect Medium Rare Prime Rib Roast - cooking recipe

Ingredients

5 lbs prime rib roast
2 tablespoons butter

Preparation

Preheat oven to 450\u00b0F.
Pat the rib roast dry with a paper towel or napkin.
Smear the cut ends of the roast with the butter. Place the roast (ribs down or fat side up) in roasting pan.
Sear the rib roast for 15 minutes at 450\u00b0F, then turn the oven to 325\u00b0F for the rest of the cooking time. Every 1/2 hour, baste the cut ends of the roast with the fat accumulated in the roasting pan.
Cook until rib roast reaches an internal temperature of 120\u00b0F Remove from oven, cover loosely with aluminum foil, and let sit approximately 20 minutes. The roast will continue to cook as it sits. Serve when the internal temperature reaches 130\u00b0F.