Peppercorn and Mustard Prime Rib Roast

Peppercorn and Mustard Prime Rib Roast


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This peppercorn and mustard prime rib roast is a wonderful main course recipe you can serve to a hungry crowd. When paired with mashed potatoes and some au jus on the side, you'll be in heaven!

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Time needed

1 days preparation + 2 hour cooking

Serving Size / Yield

10-12 servings


  • 5 Tbs. minced garlic
  • 2 Tbs. sea salt
  • 2 Tbs. cracked peppercorns (red, green, and black)
  • 3/4 C. Dijon mustard
  • 8 lb. rib roast

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Rub the rib roast with mustard, peppercorns, garlic, and salt. Allow to sit in the refrigerator overnight wrapped in plastic wrap.

The next day, allow roast to come to room temperature before baking. Place fat-side up into a roasting pan and preheat the oven to 450 degrees. Place roast on the lowest rack. Roast for 45 minutes, then reduce the oven temperature to 350. For medium rare, cook about 90 minutes at 350. Modify cooking time to your personal doneness preference.

Allow to sit for 20-30 minutes prior to serving.

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