Our Slow Roasted Prime Rib Roast recipe is a MUST-MAKE holiday favorite! Our melt in your mouth recipe only needs 4 ingredients and is so easy to prepare! Wow your guests with this melt in your mouth easy prime rib recipe! This is the easiest boneless prime rib roast recipe you will ever make.
Why is this the Best Prime Rib Recipe
Our Prime rib is slow roasted to perfection and seals in all the juices. A reverse sear method ensures a crisp crust on the outside for maximum flavor. When a slow roast rib of beef is reverse seared guarantees the juiciests prime rib ever!
You are going to want to slow roast a prime rib more than just for Christmas Dinner after you try our recipe.
What is Prime Rib?
The prime rib roast is a cut of beef from the primal rib section of the cow. While the entire rib section is comprised of ribs 6 through 12, a Standing Rib Roast may contain anywhere from two to seven ribs depending on the number of servings you need.
A prime rib is most often roasted “standing” on the rib bones so that the meat does not touch the pan, however, a slow roast prime rib is easier to serve when it is boneless as you don’t have to carve around the bones. If you choose to go boneless, as we did for our slow-roasted prime rib, you will need a roasting pan with a rack.
What is the difference between Prime Rib and Ribeye Steaks?
Prime rib is a roast with more muscle and fat. Ribeye is a steak cut from the prime rib roast. The cooking method for each cut is different. You roast a Ribeye Roast Recipe on a rack in the oven which takes much longer than a ribeye steak that you can either pan sear in a skillet on the stove-top or cook on the grill.
How to Buy a Perfect Prime Rib
It’s all about the marbling! Trust us on this, the perfect prime rib will have lots of marbling or white flecks throughout the beef.
What is marbling on meat?
The word marbling refers to white flecks and streaks of fat within the lean sections of beef. The name Marbling came about because the streaks of fat resemble a marble pattern. It is also called intramuscular fat. Marbling adds so much flavor to beef and is is one of a main criteria for judging the quality of cuts of beef.
We love purchasing Certified Angus Beef® brand Prime Rib because it guarantees we are purchasing the best quality beef with lots of marbling.
TIP – For maximum flavor and tenderness be sure to use Certified Angus Beef® brand Prime Rib. Click here to find a retailer near you or order online.
How 
How much Prime Rib per person
A good estimate on how much prime rib you will need is – Estimate 1/2 pound per person when the roast is part of a holiday buffet, or 3/4 pound per person if it’s the main course.
If you downloaded the Roast Perfect App, just add the number of guests and the app will do all the work for you.
How to season Prime Rib
- Salt the roast the day before and refrigerate overnight
- When ready to cook, rub the roast all over with 2 tablespoons olive oil and 1-2 teaspoons freshly cracked black pepper
- That’s it! That is all you need to make the perfect Holiday Prime Rib Roast!
Reverse Sear a Prime Rib
Slow-roasted prime rib flips the traditional method on its head!
Traditionally, roasting prime rib is done at the beginning, at a high temperature for about 15 minutes to develop the crust on the outside and then cooked at 325° for another hour or so to reach the desired degree of doneness. This method tends to have more moisture loss during the initial blast of high heat.
Slow cook a prime rib and it will lock in all the juices for maximum flavor and tenderness and delivers more evenly cooking from the center out. When you roast a prime rib low and slow in the oven you’ll notice there will be a very small amount of juice that accumulates in the bottom of the roasting pan, if any at all.
All of the drippings remain in the roast resulting in a prime rib that is more tender and juicy than any other method of cooking. Once the prime rib is slow roasted to the desired degree of doneness, put it in a high heat oven for about 15 minutes before serving to achieve a beautifully crisp, browned crust on the outside which adds tons of flavor!
How to cook a Prime Rib Roast Perfectly
- Use the FREE Roast Perfect App by Certified Angus Beef® brand to select the perfect size roast for the number of guests you are serving. Click here to download the Roast Perfect App for free
- Salt the roast the day before you plan on cooking it and refrigerate overnight, uncovered
- When ready to roast, preheat the oven to 200°F
- Rub the roast all over with 2 tablespoons olive oil and 1-2 teaspoons freshly cracked black pepper
- Place prime rib roast on rack in roasting pan
- How long to cook prime rib – Place roasting pan in preheated oven until the center of the roast reads 120°F for medium-rare. About 4 hours, but time will vary depending on the size of the roast
- Remove roast from oven and tent with foil to rest for at least 20 minutes.
- Turn oven temp up to 500°F.
- Once the oven reaches 500°F, remove the foil and put the roast back in the oven. Cook until browned and crisp on the outside. About 10-15 minutes. Transfer roast to a cutting board and rest the roast at least 15 minutes
That’s it! Can you believe it is this easy to cook the Best Prime Rib Recipe?
Prime Rib Temperature Chart
Tip: It is always best to use a meat thermometer to make sure your Prime Rib is done perfectly to your liking.
- Rare: 120-125°F – Bright red interior
- Medium Rare: 130-135°F – Pink on the outer crust with a deeper red center
- Medium: 135-140°F – Mauve/light pink colored interior
- Well-done: 145°F+ – Brown, no pink
Prime Rib Leftovers
Don’t forget the leftovers! Prime Rib is just as delicious the next day! We love to make open faced prime rib recipes at our house!
Roast beef sandwiches are absolutely amazing on their own but we love elevating them by making a Cheese Sauce to drizzle on top and adding sauteéd mushrooms and onions.
And our absolute favorite is making a Prime Rib and remoulade sauce sandwich. You haven’t lived until you try this leftover sandwich!
Side Dishes for Prime Rib
Our recipe for prime rib is the ultimate Christmas dinner.
- Au Gratin Potatoes
- Roasted Artichoke Salad
- Smashed Brussel Sprouts
- Garlic Parmesan Roasted Carrots
- Brown Sugar Glazed Carrots
- Yorkshire pudding
- Butternut Squash Dinner Rolls
- Mashed potatoes
- Instant Pot Risotto
- Dinner rolls
Other Favorite Roasting Prime Rib Recipes:
The Best Roast Beef Dinner Ideas
For more roast beef recipes, try these! Don’t forget the side dishes for roast beef, either!
- Whole Beef Tenderloin
- Beef Chuck Roast Recipe
- Instant Pot Pot Roast
- Slow Cooker Mississippi Pot Roast
- Dutch Oven Pot Roast
- Easy Slow Cooker Roast Beef Recipe
📌 Pin Slow Roast Prime Rib to save for later!
Slow Roasted Prime Rib
Ingredients
- 8 lb Certified Angus Beef® brand Boneless Prime Rib Roast
- 1 Tbsp Kosher salt
- 2 Tbsp Olive oil
- 2 tsp black pepper freshly ground
Instructions
- Use the FREE Roast Perfect App by Certified Angus Beef® brand to select the perfect size roast for the amount of guests you are serving
- Salt the roast all over with 1 Tbsp kosher salt the day before you plan on cooking it and refrigerate overnight, uncovered
- When ready to roast, preheat the oven to 200°F
- Rub the roast all over with 2 tablespoons olive oil and 1-2 teaspoons freshly cracked black pepper
- Place prime rib roast on rack in roasting pan
- Place roasting pan in preheated oven until the center of the roast reads 120°F for medium-rare. About 4 hours, but time will vary depending on the size of the roast. Use an instant-read thermometer or meat probe and cook to 5 degrees below your desired temperature for doneness.
- Remove roast from oven and tent with foil to rest for at least 20 minutes. Turn oven temp up to 500°F.
- Once the oven reaches 500°F, remove the foil and put the roast back in the oven. Cook until the outside is nicely browned and crisp. About 10-15 minutes. Transfer roast to a cutting board and rest the roast at least 15 minutes before serving.
Susie says
On the show when you were on great day alive what was the name of that meat market in St Pete where you got that roast