perfect garlic herb prime rib roast in a roasting pan

Perfect Garlic Herb Prime Rib Roast Recipe

  • Author: Krista
  • prep_time Prep Time: 2 hr
  • cook_time Cook Time: 5 hr
  • total_time Total Time: 7 hr
  • yield Yield: 8-10 1x
  • category Category: Gluten Free, Paleo, Holiday, Christmas, New Years
  • method Method: Oven
  • cuisine Cuisine: American


This holiday season serve your guests the Perfect Garlic Herb Prime Rib Roast! An easy to follow prime rib recipe slow roasted to lock in all the juices, topped with a garlic herb butter then reverse seared to ensure a nice crust. 



  • 57 lb. Bone-in Prime Rib Roast
  • 5 garlic cloves, minced
  • 2 1/2 teaspoons truffle salt
  • 2 teaspoons of black pepper
  • 1 tablespoon fresh rosemary
  • 1 tablespoon fresh thyme
  • 1 tablespoon fresh oregano
  • 1/3 cup unsalted butter, softened
  • 1 large yellow onion
  • 1 head of garlic, sliced in half
  • 8 sprigs of thyme
  • 2 sprigs of rosemary


  1. Remove your covered roast from the refrigerator and let it rest for 30 minutes prior to roasting to bring to room temperature.
  2. Prepare your roasting pan by add 1 large onion to the bottom of the pan along with whole head of garlic (sliced in half, flesh side up), 8 sprigs of thyme and 2 sprigs of rosemary. Set aside.
  3. Pat Prime Rib Roast dry with paper towel.
  4. Preheat oven to 225 degrees F.
  5. In a small bowl, add garlic clove, salt, black pepper, fresh rosemary, fresh thyme and fresh oregano. Using a spoon mix together.
  6. Remove 1 tablespoon of the mixture and add it to another small bowl with 1/3 cup unsalted softened butter. Mix together, then set aside.
  7. To the bowl with the remaining herb mixture, add 2 tablespoons of olive oil and mix together to form a paste.
  8. Rub garlic herb paste all over the the Prime Rib using your hands and place bone side down on a rack in a roasting pan.
  9. Roast, uncovered, for 3-4 hours, time will vary depending on the size of your roast. Using an instant read thermometer, check the temperature of the roast. (this is key, you want to cook the roast until it is at your desired temperature)
  10. When the center of the roast reaches 120 degrees F (for medium rare), remove from the oven and tent with tin foil for 20 minutes. Turn oven up to 500 degrees F.
  11. Once the oven reaches 500 degrees F. Remove tin foil tent and rub the garlic herb butter on the top and sides of the roast.
  12. Place roast back in oven, uncovered, for 15-20 minutes. You want the outside of the roast to be nicely browned.
  13. Remove prime rib roast from the oven and place on a cutting board to rest for 20 minutes.
  14. Serve with horseradish sauce or au jus.

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