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A close-up image of the ultimate easy prime rib, sitting on a plate on a countertop. A small bowl of mashed potatoes can be seen behind the plate.
Dairy Free/gluten-free/Grain Free/Nut Free/Paleo/Refined Sugar Free

The Ultimate Easy Prime Rib

5 from 9 votes
Nicole Modic
Prep Time 2 hours 15 minutes
Cook Time 1 hour 50 minutes
Total Time 4 hours 15 minutes
SERVES 10 Servings
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If your holiday isn't complete without prime rib, then you're not alone. This thick, hearty cut of meat is a staple in so many households this holiday season. And while it's often thought of as complicated to make, it's actually simpler than you think. This is The Ultimate Easy Prime Rib, and is the simplest, easiest way to enjoy the comfort of this holiday recipe, right from your own home.

Ingredients

  • 5 Pounds Prime Rib bone-in
  • 3 Tablespoons Kosher Salt
  • ½ Cup Olive Oil
  • 8 Cloves Garlic mashed
  • 3 Tablespoons Fresh Rosemary finely chopped
  • 2 Tablespoons Fresh Thyme finely chopped
  • 2 Teaspoons Onion Powder
  • 1 Teaspoon Ground Black Pepper

Instructions

  • To make this perfect prime rib, start by preparing the meat. Bring the meat to room temperature approximately two hours before you plan to cook it. This is extremely important!
  • Once you're ready to cook the meat, preheat your oven to 500 F.
  • Next, prepare the meat by rubbing sea salt all over the prime rib. Then, set it aside while you prepare the marinade.
  • Make the marinade by mixing together the olive oil, mashed garlic, chopped rosemary, chopped thyme, onion powder, black pepper and another generous pinch of salt in a small bowl.
  • Mix the marinade together, then rub it all over the prime rib.
  • Place the prime rib into a cast iron skillet (note: you do NOT need to preheat the skillet beforehand!) and place it in the oven to cook for 20 minutes.
  • Once the 20 minutes are up, remove the prime rib from the oven, and reduce the oven temperature to 325 F.
  • Then, insert a meat thermometer, placing the pointy tip of the thermometer into the top of the prime rib, pushing it down into the center of the prime rib. If you aren't using a meat thermometer, see my notes below for the optimal cook time!
  • For a medium rare cook, allow the meat to cook until it reaches an internal temperature of 135 F - this took approximately 1.5 hours.
  • Once it's done, remove it from the oven and use tin foil to create a tent around the prime rib while it cools. The prime rib should take approximately 40 minutes to cool.
  • Finally, once it's done, slice it and enjoy!
Calories: 779kcal | Carbohydrates: 2g | Protein: 31g | Fat: 71g | Saturated Fat: 27g | Polyunsaturated Fat: 3g | Monounsaturated Fat: 34g | Cholesterol: 137mg | Sodium: 2195mg | Potassium: 530mg | Fiber: 0.4g | Sugar: 0.1g | Vitamin A: 85IU | Vitamin C: 3mg | Calcium: 33mg | Iron: 4mg

Notes

To ensure that your prime rib cooks properly, I highly recommend using a meat thermometer. My favorite is the Yummly Smart Thermometer - it connects to your phone via the Yummly app, and sends you a notification once the meat has reached your desired internal temperature and cook.
If you don't have a meat thermometer, a general rule of thumb is to first cook the prime rib at 500 F for 20 minutes, then cooking it at a reduced heat of 325 F at 20 minutes per pound of meat - for the 5 pound Prime Rib that this recipe calls for, at a medium rare cook, that would be 1 hour of cook time. If you desire a different cook on the meat, you can try the following cook times and temperatures.
  • Rare: 10-12 minutes per pound / 115-120 F
  • Medium: 13-14 minutes per pound / 135-140 F
  • Medium Well: 20-22 minutes per pound / 145-150 F

Did you make this recipe?

I’d love to see what you made - tag @kalejunkie
in your posts and I’ll re-share!

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