Prime Rib With Mashed Potatoes And Asparagus Recipe

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Avatar Author's default profile picture Team Modified: March 16, 2022

This recipe goes above and beyond your regular steak and potatoes dish. While it may take a while to get it from the kitchen to the dinner table, the juicy prime rib taste is worth every minute. Pair it with some tasty asparagus spears and you have a meal you’ll want to make more than once. This also a perfect recipe for a dinner for two on Valentine’s day.

Prime Rib With Mashed Potatoes And Asparagus Recipe

How To Make Prime Rib With Mashed Potatoes And Asparagus

Fancy prime rib recipe with filling vegetables of potatoes and asparagus.

Prep: 30 mins
Chill And Rest Time:: 11 hrs
Cook: 3 hrs 25 mins
Total: 14 hrs 55 mins


For Roast:

  • 3 lb prime rib roast, (up to 4 lb), or 6 to 8 lb, bone-in
  • 3 tbsp whole-grain mustard
  • coarse salt and cracked black pepper, to season
  • ¼ cup olive oil
  • 6 garlic cloves, minced
  • 4 sprigs rosemary, finely chopped, fresh

For Mashed Potatoes:

  • lb potatoes, peeled and cut into large chunks
  • cup unsalted butter
  • ¼ cup heavy cream
  • salt and ground white pepper, to taste
  • water, for boiling
  • ¼ cup whole milk

For Asparagus:

  • 1 lb asparagus spears
  • ¼ cup unsalted butter
  • 3 garlic cloves, thinly sliced
  • 2 tbsp olive oil
  • salt and ground black pepper, to taste

For Serving:

  • ½ cup steak sauce, per serving
  • 4 oz mashed potatoes, per serving
  • 4 oz asparagus, per serving



  1. Truss your rib roast with butcher’s twine, then generously season with salt and pepper.
  2. Place this onto a wire rack, cover with cling wrap, set aside in your chiller, and allow the seasoning to penetrate into the meat, at least overnight for up to 48 hours.
  3. Preheat the oven to 250 degrees F.
  4. In a small bowl, stir to combine garlic, rosemary, oil, and mustard.
  5. Ensure to let your rib roast come to room temperature 2 to 3 hours before roasting.
  6. Rub this all over your rib roast, then place this onto either a roasting pan or a baking sheet with a wire rack on it.
  7. Roast until the core temperature of your rib roast reads 118 F, roughly 2½ hours.
  8. Increase oven temperature to its highest setting, then broil your rib roast until golden brown, roughly 15 minutes.
  9. Set aside in a warm area, covered with foil, to rest and until ready to serve.

Mashed Potatoes:

  1. In a soup pot, cover your potatoes with enough water to submerge them. Boil potatoes until tender, roughly 30 minutes.
  2. Drain potatoes well, then mash these using either a ricer or a masher.
  3. Add the rest of your ingredients and fold until evenly incorporated and smooth.
  4. Adjust seasoning with salt and pepper. Set aside in a warm area until ready to serve.


  1. Melt butter and heat up oil in a skillet.
  2. Add garlic and saute briefly for no more than a minute.
  3. Add asparagus and continue sauteing.
  4. Season to taste with salt and pepper.
  5. Portion your prime rib with mashed potatoes and asparagus. Serve with any steak sauce of your choice.


  • Sugar: 9g
  • :
  • Calcium: 154mg
  • Calories: 1820kcal
  • Carbohydrates: 74g
  • Cholesterol: 296mg
  • Fat: 145g
  • Fiber: 10g
  • Iron: 11mg
  • Monounsaturated Fat: 63g
  • Polyunsaturated Fat: 7g
  • Potassium: 2367mg
  • Protein: 58g
  • Saturated Fat: 62g
  • Sodium: 821mg
  • Trans Fat: 1g
  • Vitamin A: 2248IU
  • Vitamin C: 74mg
Nutrition Disclaimer
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