How Long To Cook A Boneless Prime Rib Roast Medium

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Cook up an unforgettable holiday dinner with our easy Boneless Prime Rib Recipe! Only 5 minutes of prep and 3 simple ingredients: beef, salt, and pepper. This is the best boneless rib roast that's so simple to make and packed with flavor!

Two slices of boneless prime rib roast on a white plate

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What tools do I need to roast prime rib?
Boneless Prime Rib Roast Ingredients
How to Season Prime Rib
How to Cook a Boneless Prime Rib
Boneless Prime Rib Cooking Time
Prime Rib Temperature Chart
Recipe Tips
How to Make Au Jus
How Long Will Prime Rib Last in the Fridge
Best Way to Reheat
How Long to Thaw a Frozen Prime Rib
Our Favorite Roast Beef Recipes
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When we say this is one of the easiest prime rib recipes you will ever make, we mean it!

This boneless rib roast recipe is as delicious as it gets. Using just salt, pepper, and a beautifully marbled cut of beef, we are going to show you how to make the juiciest, most tender rib roast. It's perfect for serving over any holiday meal.

Paper towels to pat the roast dry
Baking sheet with a roasting rack
Your oven
Aluminum foil to tent the roast once it's done cooking
Cutting board and knife

Boneless Prime Rib Roast Ingredients

Boneless rib roast
Sea salt
Freshly cracked black pepper

The key to cooking a beautiful prime rib roast is picking a cut of beef with perfect marbling.

Marbling refers to the white lines of fat running through the beef. The better the marbling, the more flavor your roast will have! Look for fine, web-like marbling.

TIP—Remove your roast from the refrigerator 30 minutes before cooking it and allow it to come to room temperature. This way, it will cook evenly!

How to Season Prime Rib

A rib roast is so flavorful that we like to keep our prime rib seasoning simple: just salt and pepper. We recommend using sea salt. The taste and texture of sea salt is so perfect for seasoning a prime rib roast and gives it the perfect crust. Our prime rib rub recipe works well, too.

If you like, you can also add herbs. Rosemary is a perfect choice for pairing with prime rib. Chop up rosemary and pair it with the salt and pepper to season your roast for an extra tasty prime rib recipe.

Uncooked boneless rib roast on a white surface with salt and pepper seasoning

How to Cook a Boneless Prime Rib

Follow these prime rib cooking instructions for the perfect roast:

Preheat your oven to 450°F and pat your boneless rib roast dry with paper towels.

Generously season your roast with sea salt and black pepper. Give it a good coating.
Place the roast fat-side up on a pan with a roasting rack. Add it to the oven and cook for 15 minutes at 450°F.
Reduce the temperature to 325°F and cook for an additional 1 hour and 40 minutes (4 lb. roast).
Once time is up, move the beef to a cutting board and tent it with foil loosely. Allow it to rest for 15 minutes under the foil. After resting, carve the beef against the grain for best results. Serve, and enjoy!

Boneless Prime Rib Cooking Time

Your boneless prime rib cooking time will depend on the size of the roast:

4 lb. roast: 15 minute sear + 1 hour 40 minutes cook time
5 lb. roast: 15 minute sear + 1 hour 45 minutes cook time
6 lb. roast: 15 minute sear + 1 hour 50 minutes cook time

This recipe is keto friendly. Try more of our Best Keto Beef Recipes!

Prime Rib Temperature Chart

Rare: 120-125°F. Inside is bright red.
Medium Rare: 130-135°F. Pink on the outside with a deep red middle.
Medium: 135-140°F. Light pink on the inside.
Well-done: 145°F+. Brown with no pink.

For best results, always use a meat thermometer to measure the internal temp for prime rib. Follow our Prime Rib Degree of Doneness Chart.

Our recipe will give you a medium-rare, perfect prime rib roast. Add 10-15 minutes to the roasting time if cooking the roast to medium.

Use the leftovers to make Leftover Prime Rib Pasta!

Recipe Tips

Use a meat thermometer! This is a must for roast beef recipes, and especially for prime rib recipes, to achieve your perfect desired degree of doneness every time.
Allow your roast to come to room temperature before placing it in the oven. This way, it will cook evenly throughout.
Use a roasting pan with a rack so air can circulate around the whole roast.
Let your roast rest! Once it's done roasting, tent your beef with foil and let it sit for 15 minutes before carving.
Slice against the grain. This is vital! The grain refers to the lines running through the beef. Slice against the grain for the most tender sliced prime rib.

How to Make Au Jus

You can easily make au jus with drippings to use for this boneless prime rib recipe. Follow these instructions to make your own au jus:

After cooking your roast, remove it from the roasting pan. Place the roasting pan over low heat on the stove or add the drippings from the roast pan to a saucepan.
Whisk in 1 tablespoon Worcestershire sauce plus 1 cup red wine. Cook, stirring and scraping up any brown bits from the bottom of the pan.
Add 1 cup beef broth and bring to a simmer. Serve hot with sliced prime rib, and enjoy!

How Long Will Prime Rib Last in the Fridge

Leftover prime rib will last 5 to 7 days in the refrigerator. For best results, store with au jus or beef gravy drizzled over the top. This will help keep it moist.

Best Way to Reheat

Preheat your oven to 250°F.
Add leftover prime rib to a roasting pan with leftover au jus, beef gravy, or beef stock, and cover with foil.
Place in the oven for 10 minutes, or until heated through.

How Long to Thaw a Frozen Prime Rib

Place your rib roast in a pan in the refrigerator for at least two days before you plan to cook it so it thaws completely. For larger roasts, allow an additional day. Bring it to come to room temperature, then follow the roasting instructions!

Close up of two slices of prime rib on a white plate

Our Favorite Roast Beef Recipes

Try more of my best prime rib recipes for the holidays! Start off with my tips on The Best Way to Cook Prime Rib.

Dutch Oven Pot Roast
Sous Vide Prime Rib
Sous Vide Beef Tenderloin with Garlic Herb Butter
Reverse Sear Instant Pot Prime Rib Roast
Tender Smoked Prime Rib Recipe

I love easy cuts of beef and another one of my favorites is brisket. My smoked brisket recipe will have your entire family drooling when you make it. It takes a bit of time on the smoker but boy is it worth it. If you love smoking, you will also love my smoked beef short ribs!

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📋 Recipe

Boneless Prime Rib Roast Recipe

Our boneless prime rib roast recipe is easy, tender, and so delicious! A perfect holiday meal.

Prep Time 5 mins

Cook Time 1 hr 40 mins

Total Time 1 hr 45 mins

Course: Prime Rib Recipes

Cuisine: American

Keyword: boneless prime rib, boneless prime rib roast, prime rib, prime rib roast, prime rib roast recipe, roast beef, roast beef recipes

Servings: 8

Calories: 774 kcal

Author: Best Beef Recipes

Oven

4-6 lb. boneless prime rib roast
1 Tbsp. sea salt
1 tsp. black pepper
OR our prime rib rub

Preheat your oven to 450°F and pat your boneless rib roast dry with paper towels. Generously season your roast with sea salt and black pepper. Give it a good coating.
Place the roast fat-side up on a pan with a roasting rack. Add it to the oven and cook for 15 minutes at 450°F. Once 15 minutes is up, reduce the temperature to 325°F and cook for an additional 1 hour and 40 minutes (4 lb. roast).
Once time is up, move the beef to a cutting board and tent it with foil loosely. Allow it to rest for 15 minutes under the foil. After resting, carve the beef against the grain for best results. Serve, and enjoy!

Boneless prime rib cooking time:

4 lb. roast: 15 minute sear + 1 hour 40 minutes cook time
5 lb. roast: 15 minute sear + 1 hour 45 minutes cook time
6 lb. roast: 15 minute sear + 1 hour 50 minutes cook time

Tips for cooking a perfect prime rib roast:

Use a meat thermometer! This is a must for roast beef recipes, and especially for prime rib recipes, to achieve your perfect desired degree of doneness every time.
Allow your roast to come to room temperature before placing it in the oven. This way, it will cook evenly throughout.
Use a roasting pan with a rack so air can circulate around the whole roast.
Let your roast rest! Once it's done roasting, tent your beef with foil and let it sit for 15 minutes before carving.
Slice against the grain. This is vital! The grain refers to the lines running through the beef. Slice against the grain for the most tender sliced prime rib.