HOW TO MAKE BONELESS PRIME RIB ROAST RECIPES

Steps:

• Season roast all over with 2 Tbsp. steak seasoning. Transfer to a wire rack set inside a rimmed baking sheet and let sit at room temperature 1 hour.
• Preheat oven to 225°F. Roast beef until an instant-read thermometer inserted into the center registers 120°F, 3 1/2–4 hours (start checking every 5–10 minutes after 3 1/2 hours). Tent with foil and let sit at least 30 minutes and up to 1 hour. Increase oven temperature to 500°F.
• Meanwhile, whisk sour cream, horseradish, pepper, salt, and 1/4 cup mustard in a small bowl; set aside.
• Remove string from roast; discard. Stir butter and remaining 1/4 cup mustard in another small bowl. Using a pastry brush, thickly coat roast with mustard-butter sauce. Coat with remaining 2 Tbsp. steak seasoning. Roast beef until a brown crust forms, 5-10 minutes. Transfer to a cutting board and carve. Serve with sour cream sauce alongside.
• Sour cream sauce can be made 1 day ahead. Transfer to an airtight container and chill.

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.