HOW TO MAKE A PRIME RIB ROAST IN THE OVEN RECIPES

Steps:

• Remove the roast from the refrigerator 2 or 3 hours before cooking.
• Preheat oven to 450.
• Rub butter on the cut ends of the roast.
• Combine flour, salt and pepper together in a small bowl, and then massage the mixture all over the meat.
• Set the roast, rib side down, in a shallow roasting pan (the ribs act as a natural rack), and place in the oven. Roast for approximately 20 to 30 minutes, or until the roast is nicely darkened. Reduce oven to 350 and continue to roast, basting every 15 or 20 minutes, until the roast reaches an internal temperature of 125 degrees (for medium-rare) on an instant-read thermometer. Remove the roast to a cutting board and let rest for 20 minutes before carving into either huge slabs or off the bone entirely and then thin slices.

Steps:

• For the prime rib: Preheat the oven to 500 degrees F. Put the butter, horseradish, peppercorns and 2 tablespoons salt in a medium bowl and stir until evenly combined. Slather the seasoned butter evenly over the top and sides of the roast (leave the bottom bare) and put on a rack set in a large roasting pan. Roast for 35 to 40 minutes (5 minutes per pound), then turn the oven off and let the roast sit inside the oven for 1 1/2 hours (do not open the oven door during this time). It should be dark golden brown on the outside and medium rare on the inside.
• For the sauce: Meanwhile, whisk the sour cream, horseradish, 2 teaspoons salt and 1 teaspoon pepper together in a medium bowl until well combined. Stir in the chives, cover and refrigerate until ready to serve. 
• Cut the roast into 1-inch-thick slices and serve with the sauce.