Grilled Prime Rib Roast

A coating of garlic and horseradish flavors this grilled prime rib roast. It is easy to make, and requires only a few ingredients. I've also included a recipe for a special sauce that's great for dipping the prime rib.


  • One standing beef rib roast
  • One teaspoon salt
  • Four to six cloves garlic, crushed
  • Two tablespoons grated horseradish
  • Two tablespoons olive oil

Score through the fat layer covering the rib roast, then season it with the salt. Combine the crushed garlic, horseradish and the olive oil, then coat the scored side of the rib roast with the mixture.

Grilling the Rib Roast

Preheat your grill to medium-high heat, between 325F to 350F. The rib roast need to be grilled using indirect heat, so set up your grill for the indirect method of grilling.

Place the roast on the grill and cook with the lid in place. Depending on the temperature of the grill, the size of the roast, and the level of doneness desired, the beef prime rib can take from 10 to 20 minutes per pound to complete.

It's more important to monitor the internal temperature of the rib roast than to watch the time. With a good remote meat thermometer you can monitor the meat temperature without opening up the grill.

Remove the roast when it reaches a temperature about 5 degrees under the temperature you're shooting for. After the meat is taken off the grill, the internal temperature will continue to rise.

Medium Rare130ºF125ºF
Medium135º - 140ºF130º - 135ºF

Take the prime rib roast off of the grill when it reaches the "Remove At" temperature. Cover it with foil and let it rest for about 20 minutes before slicing and serving.

Prime Rib Sauce Recipe

For this easy dipping recipe, you'll need...

  • One tablespoon of prepared horseradish
  • One-half teaspoon salt
  • One clove garlic, finely minced
  • Two tablespoons mayonnaise
  • One tablespoon lemon juice
  • Two tablespoons softened cream cheese

Mix the ingredients together and refrigerate. If you'd like a sweeter sauce for your grilled prime rib roast, use Miracle Whip instead of the mayo.

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