Perfect Medium Rare Prime Rib Roast

Step 1

Preheat oven to 450°F.

Step 2

Pat the rib roast dry with a paper towel or napkin.

Step 3

Smear the cut ends of the roast with the butter. Place the roast (ribs down or fat side up) in roasting pan.

Step 4

Sear the rib roast for 15 minutes at 450°F, then turn the oven to 325°F 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.

Step 5

Cook until rib roast reaches an internal temperature of 120°F 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°F.