Go Back

Garlic Butter Prime Rib Roast

Garlic butter prime rib roast is oven-roasted with a savory butter, garlic, rosemary, and thyme coating. A high-heat start builds a flavorful exterior, while a thermometer helps guide the roast to 145°F.
Print Recipe Pin Recipe
Prep Time 15 minutes
Cook Time 2 hours 15 minutes
Resting 20 minutes
Total Time 2 hours 50 minutes
Servings: 8 servings
Course: Dinner
Cuisine: American
Calories: 900
Ingredients Equipment Method Notes

Ingredients
  

  • 1 beef rib roast 5-pound, boneless, tied
  • 0.5 cup unsalted butter softened
  • 6 cloves garlic minced
  • 1 tbsp fresh rosemary finely chopped
  • 2 tsp fresh thyme leaves
  • 1 tbsp kosher salt
  • 1 tsp black pepper

Equipment

  • 1 roasting pan

Method
 

  1. Preheat the oven to 450°F.
  2. Set a rack in a roasting pan.
  3. Pat the roast dry.
  4. Mix the softened butter, garlic, rosemary, thyme, salt, and pepper in a small bowl.
  5. Spread the mixture over the roast.
  6. Set the roast fat-side up on the rack and roast for 15 minutes.
  7. Reduce the oven to 325°F.
  8. Continue roasting for about 1 1/2 to 2 1/2 hours, until a thermometer inserted in the thickest part away from bone or fat registers 145°F.
  9. Transfer the roast to a cutting board and tent loosely with foil.
  10. Rest for 20 minutes; let it rest at least 3 minutes before carving.
  11. Remove the twine.
  12. Carve the roast into slices and serve.

Notes

For the most reliable doneness, check the temperature in the thickest part away from bone or fat. Refrigerate leftovers for 3–4 days; freeze for up to 3 months. For a dairy-free variation, use plant-based butter.