5 from 15 votes
how to cook a prime rib roast
How to Cook Prime Rib Roast
Prep Time
10 mins
Cook Time
3 hrs 45 mins
Total Time
5 hrs 10 mins

How to cook prime rib roast from start to finish! This is a foolproof method that guarantees a great prime rib roast! 

Course: Main Course
Cuisine: American
Servings: 15
Calories: 1352 kcal
  • one prime rib roast of choice
  • butter if there isn't enough fat
  1. Remove your roast from all its packaging and  let it sit out for an hour until it's about room temperature.
  2. Take the butter and cover not only the ends, but if you don't have a layer of fat on the top, cover that as well. This roast didn't have a layer, it was butchered too close,  so I put a layer of butter on top.
  3. Preheat your oven to 450 degrees at this point.
  4. Once it's covered, place on a wire rack in a pan deep enough to catch the drippings.
  5. Now we want to sear the roast. Place it in the 450 degree oven for about 20 minutes.
  6. Turn down the oven to 325 degree and cook some more. Below are guidelines for roasting a prime rib roast .You want to pull the roast out a minimum of 10 degrees BEFORE you hit these temperatures.
  7. Once the roast is out, tent it with foil, and let it sit for about 20 minutes. The temperature will rise at least another 10 degrees if you cover it in foil. It also lets the juices set and flow back to the meat.
  8.  Now it's time to remove the bones. You want to slice along the curve of the bones and remove the meat. Slice it off, then slice as you would normally slice a roast.
  9. Serve and enjoy!
Prime Rib Roasting Internal Temperatures
  1. Blue in the middle- 110 degrees - when the middle of the roast still "quivers"

  2. Rare- 120-125 degrees in the middle
  3. Medium-rare- 125- 135 degrees in the middle
  4. Medium - 135- 140 degrees in the middle. You don't want it cooked this much.
  5. Medium Well-140- 150
  6. Well-done- 155 +

Recipe Video

Recipe Notes
Nutrition Facts
How to Cook Prime Rib Roast
Amount Per Serving
Calories 1352 Calories from Fat 1080
% Daily Value*
Fat 120g185%
Saturated Fat 50g250%
Cholesterol 274mg91%
Sodium 201mg8%
Potassium 1002mg29%
Protein 61g122%
Calcium 34mg3%
Iron 6.5mg36%
* Percent Daily Values are based on a 2000 calorie diet.