Mustard-Crusted Boneless Prime Rib Roast with Cream Sauce
Mustard-Crusted Boneless Prime Rib Roast with Cream Sauce is a flavorful French French Receipes dish prepared with quality ingredients. Season roast all over with 2 Tbsp. steak seasoning.
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Easy Prep ≤ 4 steps · Fast & beginner friendly
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Moderate 5–8 steps · Everyday home cooking
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Expert ≥ 9 steps · Multi-step advanced prep
Ingredients Required
Tap or click any ingredient to check off during cookingStep-by-Step Cooking Method
Follow numbered steps for authentic taste and perfectionSeason 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.
Chef's Secret Tips & Serving Pairings
- Serve hot and fresh as a wholesome non-vegetarian meal.
- Pairs excellently with steamed rice, flatbreads, or fresh salad garnish.