Slow Roasted Prime Rib Roast Recipe

Our Slow Roasted Prime Rib recipe is a MUST-MAKE holiday favorite! Prime rib slow roasted to perfection seals in all the juices and a reverse sear to ensure a crisp crust on the outside for maximum flavor.

Total Time: 4 hrs 25 mins

Our Slow Roasted Prime Rib Roast recipe is a MUST-MAKE holiday favorite! It will melt in your mouth and is sure to become a holiday favorite at your house.

Only 4 ingredients and is so easy to prepare! You will “Wow” your guests with this melt-in-your-mouth easy rib roast recipe. This is the easiest boneless roast recipe you will ever make and the best way to cook prime rib!

Why is this the best prime rib recipe?

Our reverse sear rib roast is slow roasted to perfection to seal in all the juices that make a beef roast extra delicious. A reverse sear method ensures a crisp crust on the outside for maximum flavor. When a slow roast rib of beef is reverse seared, it guarantees the juiciest prime rib ever!

You are going to want to make our slow-roasted prime rib recipe more than just for  Christmas dinner after you try our recipe. You’ll want to find every excuse to make it!

We happen to think that this is the best holiday recipe in the world and make it for Christmas dinner year after year!

What is prime rib?

This cut of beef is the most tender and succulent piece of meat you will taste. If cooked properly, it literally melts in your mouth!

It 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 standing roast is most often roasted “standing” on the rib bones so 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?

The standing rib roast 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. When cooking a rib roast, you roast a ribeye roast recipe on a rack in the oven which takes much longer than a ribeye steak, A ribeye steak is much quicker, you can either pan sear in a skillet on the stove-top or cook on the grill.

Slow Roasted Recipe Ingredients

You need only four ingredients to slow-roast a prime rib! We use simply salt, pepper, and olive oil. The important part is having the perfect cut of beef to roast to make the best prime rib recipe.

• 8 lb. Certified Angus Beef® brand Boneless Rib Roast
• 1 Tbsp. Kosher salt
• 2 Tbsp. Olive oil
• 2 tsp. black pepper freshly ground

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 term “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 the main criteria for judging the quality of cuts of beef.

I always look for quality when I look for a prime rib near me. 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.

Many times during the holidays I find there is prime rib on sale near me. I love purchasing Certified Angus Beef® brand prime rib because it guarantees we are purchasing the best quality beef with lots of marbling!

How much holiday rib per person?

A good estimate on how much boneless prime rib you will need is 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

Before you cook your boneless rib roast recipe, you’ll want to season it ahead of time and let it absorb the flavor of your seasoning.

Best Prime Rib Seasoning (it’s so simple)

1. Salt the roast the day before and refrigerate overnight.
2. When ready to cook, rub the roast all over with 2 tablespoons olive oil and 1-2 teaspoons freshly cracked black pepper
3. That’s it! That is all you need to make the perfect holiday prime rib roast with simple yet delicious prime rib seasoning!

Garlic Butter Prime Rib Seasoning

We highly recommend trying our Garlic Butter Recipe with this prime rib slow roast recipe! Our garlic herb butter prime rib sauce adds so much flavor to a simple prime rib roast. You’ve got to try it!

How to Make Prime Rib

Slow-roasting 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°F 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.

Why is cooking Prime Rib low and slow best?

Cooking prime rib low and slow will lock in all the juices for maximum flavor and tenderness. Plus, slow roasting delivers more even 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 roast 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!

This truly is our favorite recipe for a roast. We are going to show you how to cook a boneless prime rib roast in the oven perfectly.

How to Cook Prime Rib Roast

It truly is so easy to learn how to cook a boneless prime rib roast perfectly. It simply comes down to how many people you are serving and the desired doneness for your roast. Here are the instructions you need for making an easy prime rib recipe in the oven:

1. Use the FREE Roast Perfect App from 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.
2. Salt the roast the day before you plan on cooking it and refrigerate overnight, uncovered.
3. When ready to roast, preheat the oven to 200°F.
4. Prime Rib Rub – Rub the roast all over with 2 tablespoons olive oil and 1-2 teaspoons freshly cracked black pepper.
5. Place the roast on rack in roasting pan.
6. How long to cook prime rib: Place roasting pan in the 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.
7. Remove roast from oven and tent with foil to rest for at least 20 minutes.
8. Turn oven temp up to 500°F.
9. 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

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Prime Rib Cooking Time

It is always best to use a meat thermometer to make sure your roast beef is done perfectly to your liking. The free Roast Perfect App will give you a perfect estimate of how long your roast should cook for your desired doneness, but when using a meat thermometer to check, look for the following numbers.

Prime Rib Temperatures

Prime Rib Cooking Time Per Pound Chart|Prime Rib internal temp

• 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

Tips for cooking the Perfect Holiday Roast

• The night before, cut, unwrap the beef and set it in the refrigerator. Keep it uncovered on the ​sheet pan with a rack. This allows the surface moisture to evaporate and will guarantee a beautiful brown crust when you sear it.
• Three hours before roasting, take the beef out and place it on a sheet pan (to catch any juices) and keep at room temperature. This step is key to an evenly roasted roast beef recipe.
• Rest your prime rib for 15-20 before slicing. This will help keep in all the juices for the juiciest and moistest roast.
• We love serving a rare prime rib and then using au jus gravy to finish cooking the meat. Perfection!

How to Cut a Prime Rib Roast

Place your prime rib roast on a wooden meat cutting board with juice groove and choose the sharpest slicing knife you own. Look at the direction on the grain of the beef and slice against the grain.

It is truly a personal preference if you slice thick or thin slices. Both work and it depends on if you want a steak like an experience or more of a roast beef eating experience.

Prime Rib Leftovers

Wondering what to make with the leftover prime rib? We have just the thing!

Prime rib is just as delicious the next day! One of the best recipes you can make using leftover prime rib is Creamy Penne Pasta with Sliced Prime Rib.

It’s like an amped-up Fettuccine Alfredo with leftover prime rib – the combination is incredible!

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!

Reheating Prime Rib

I prefer to cook the meat to medium-rare so it can easily be reheated without drying out. Once you cut your beef into approximately equal slices, you can reheat by placing the meat in a microwave-safe dish.

Add a bit of leftover au jus or beef stock. Cover your dish with a paper towel and microwave on high for about one minute.

Continue to heat in 30-second increments until your roast reaches an internal temp of about 160 to 165º F.

You can also reheat your beef on the stovetop. Just add the sliced roast into a small pot with either leftover au jus or beef stock. Heat for approximately 5 minutes and serve.

Side Dishes for Prime Rib

This is the ultimate Christmas dinner, especially when you pair it with these delicious side dishes for roast beef.

• Au Gratin Potatoes
• Creamy Mashed Potatoes
• Roasted Artichoke Salad
• Brown Sugar Glazed Carrots
• Yorkshire pudding

The Best Roast Beef Dinner Ideas

• Beef Chuck Roast Recipe
• Instant Pot Pot Roast
• Slow Cooker Mississippi Pot Roast
• Dutch Oven Pot Roast
• Easy Slow Cooker Roast Beef Recipe

Favorite Holiday Roast Recipes

• Boneless Prime Rib Roast
• Standing Rib Roast Recipe
• Instant Pot Prime Rib
• Whole Beef Tenderloin

Slow Roasted Prime Rib

Our Slow Roasted Prime Rib recipe is a MUST-MAKE holiday favorite! Prime rib slow roasted to perfection seals in all the juices and a reverse sear to ensure a crisp crust on the outside for maximum flavor.

4.34 from 27 votes

Print Pin Comment

Course: Main Course

Cuisine: American

Keyword: Christmas Dinner Recipe, Easy Prime Rib Recipe, Holiday Roast Recipe, Prime Rib Recipe, Reverse Seared Prime Rib, Slow Roasted Prime Rib

Prep Time: 10 minutes

Cook Time: 4 hours

Resting time: 15 minutes

Total Time: 4 hours 25 minutes

Servings: 12

Calories: 1085kcal

Author: Marion Myers

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.

Video

Notes

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.

It is always best to use a meat thermometer to make sure your Prime Rib is done perfectly to your liking.

The night before roasting the prime rib, unwrap the beef and set it in the refrigerator. Keep it uncovered on the ​sheet pan with a rack. This allows the surface moisture to evaporate and will guarantee a beautiful brown crust when you sear it.

Three hours before roasting, take the beef out and place it on a sheet pan (to catch any juices) and keep at room temperature. This step is key to an evenly roasted prime rib recipe.

Make sure you let the prime rib rest for at least 15-20 minutes before carving

For maximum flavor and tenderness be sure to use Certified Angus Beef® brand Prime Rib

Nutrition

Calories: 1085kcal | Protein: 49g | Fat: 96g | Saturated Fat: 40g | Cholesterol: 219mg | Sodium: 884mg | Potassium: 806mg | Vitamin A: 5IU | Calcium: 29mg | Iron: 5.2mg

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