
I host Christmas dinner every year. My mom does Thanksgiving, my does Christmas Eve and I get Christmas Day. My sister makes it fun, serving lots of different appetizers that we all graze on after the presents are opened (and we might sneak a few before and during, too).
But I get the easy part – making a big Christmas dinner for everyone.
I know you might think I’m crazy, but hear me out. Making a juicy boneless prime rib is SO SIMPLE. I roughly calculate the time it will take for the roast to cook to the correct temperature so I know what time to put it in the oven. A leave-in thermometer tells me where the roast’s temperature is at while it cooks, so I can keep an eye on it. And an alarm goes off when it’s done!
I plan out my sides in advance and choose the ones that I can do most or all the work ahead of time. Since the boneless prime rib is the star of the show, I can keep the side dishes simple. These are the sides that I’ve made in the past that have worked well:

Side dishes for boneless prime rib
- Carrot Souffle – If you make any one of these side suggestions, let it be this one. Don’t worry, it’s not a “true” souffle and it really is easy! Everyone ALWAYS loves it, from toddlers to 80-year-olds. I promise you that everyone will be asking for the recipe.
- Green Beans Almondine – This is another super easy recipe and it goes perfectly with boneless prime rib. You can even blanch the beans ahead of time, then reheat them in the pan with the butter and almonds. And the beans taste great at room temperature, so if they’re ready a few minutes early, you don’t have to panic.
- Smashed Brussels Sprouts with Parmesan – Easy, delicious, not too fussy to make while doing other things. Not quite as easy as the Green Beans Almondine, but simple nonetheless.
- Easy Mushroom Risotto with Gorgonzola – This recipe is easy, yes, but more hands-on than the previous sides I mentioned. But it is SO GOOD, so if you want to make a dinner splash, this one is perfect!
- Garlic Green Beans & Portobellos (with Parmesan) – This one went over big when I served it the first year. It’s partly make-ahead; you can blanch the green beans hours ahead then set them aside. Just before eating, saute the mushrooms then toss with the green beans just to heat them up. Easy and delicious!
- Instant Pot Scalloped Potatoes – This is the quickest way I’ve found to make scalloped potatoes. Use your favorite shredded cheese or try it with a crumbled blue.
How to buy prime rib
How much prime rib will you need?
This will ultimately depend on how big a feast you’re making. The rule of thumb is 1/2 pound if it’s a feast, 3/4 pound if it’s a dinner with a few sides and 1 pound if there’s just a side to go with it.
Think about what you’ll be serving. How many appetizers? How long will people be there before you sit down to eat? If guests arrive an hour before dinner and you have a huge spread of appetizers, people are going to be half-full before they even sit down. If you have one cheese and cracker tray and it’s two hours until dinner, they might be a bit more hungry.
Having said all that, I usually go for a pound per person (unless I’m feeding 20 people, of course). I do that because I absolutely LOVE the leftovers from a boneless prime rib. We make garlic bread and use that for the bread on a prime rib sandwich with horseradish cream (YES, it’s as good as it sounds)!

What is prime rib called at the grocery store?
Your boneless prime rib likely won’t be labeled as such at the store. Other names for it are “standing rib roast”, “beef rib roast”, “boneless prime rib”, “boneless ribeye roast”, or “boneless rib roast.” When in doubt, ask the butcher! The last thing you want is to buy the wrong cut of meat.
Although prime rib contains “prime” in its name this does not mean that it is USDA Prime. It is called prime because the cut of meat comes from the primal rib section also known as the beef rib. Prime rib will most commonly be USDA choice. USDA Prime Grade Prime Rib often has to be specially ordered through a butcher or bought online from retailers such as Snake River Farms or Allen Brothers.
How much is a boneless rib roast?
That’s a difficult question to answer since prices are so different depending on where you live and it also depends on the USDA grade. I live on the U.S. East Coast and our USDA Choice boneless rib roasts are usually around $12-$25 per pound, depending on what grade the meat is.
Usually, around the holidays, rib roasts go on sale since they’re popular at that time of the year. I usually wait to buy mine until the day before unless I’ve found a deal I just can’t pass up.
You can also order a high-quality prime rib roast online. While I haven’t done this myself (yet), I’m told that Porter & York’s are great.
How do you cook boneless prime rib in the oven?
Why is prime rib served rare?
The biggest reason is that if prime rib gets overcooked, all the fat cooks out of the meat and it will become dry and tough. It doesn’t have to be served rare, but IMO, anything over medium-rare should be avoided.
The great part about cooking a rib roast to medium-rare in the center (which is how I do it) is that the edge pieces will be more cooked. My dad, for example, prefers his prime rib well past medium-rare, so he gets the end pieces and everyone else gets the middle! It’s not overcooked at this point, so the end pieces are still juicy and tender.

What is the perfect temperature to cook prime rib?
My personal belief is that boneless prime rib should be cooked to medium-rare and no more. Cook the roast to 120-125° F for rare, and 130-135° F for medium-rare.
Be sure to use a leave-in meat thermometer!! I can’t stress this enough. The reason boneless prime rib is so easy is that the thermometer takes all the guesswork out of it. If I suddenly didn’t have one, I’d choose something else to make for dinner, because I’d never take the chance on overcooking such a beautiful piece of meat.
How long do you cook a boneless prime rib?
The rule of thumb is about 15-20 minutes per pound of meat. This also depends on the temperature of your oven since the higher the temperature, the faster it will cook.
The method that I use cooks the roast at a high heat first, to lock in the juices and form a nice crust on its outside area. Then I reduce the temperature and cook it low and slow, which results in a juicy, tender roast. I usually cook an 8-pound roast, which takes about 3 hours from oven to table, including the time it will need to rest after cooking.
Should you cover prime rib while it’s cooking?
Nope! Leave it uncovered so it can form a beautiful, flavorful crust.
What about a bone-in rib roast?
Go for a bone-in rib roast if you’d like! I have an AMAZING recipe for a bone-in prime rib roast with a garlic-peppercorn wet rub. That’s usually my go-to recipe but I’m switching it up this year!
If you have any more questions about how to cook a boneless prime rib roast in the oven, shoot me an email anytime at kristy@thewickednoodle.com. And Happy Holidays!

Herb-Crusted Boneless Prime Rib Roast
If you think making prime rib is difficult, I'm here to tell you how simple it is! Make sure to use a leave-in meat thermometer for perfect results every time.
Ingredients
- 1 8-pound boneless rib roast
- 4 garlic cloves, minced
- 1/4 cup chopped fresh tarragon
- 1/4 cup chopped fresh parsley
- 3 tbsp chopped fresh thyme
- 1/3 cup chopped fresh rosemary
- 1 tbsp coarse salt
- 2 tsp freshly ground black pepper
- 1/2 cup butter, softened
Instructions
- Bring the roast to room temperature (let it sit out for at least an hour or longer).
- Preheat your oven to 450° F.
- Mix together the garlic, chopped herbs, salt, pepper and softened butter in a small dish. Rub the mixture all over the top and sides of the roast.
- Place the roast on a rack inside of a roasting pan. Place it in the oven and cook for 20 minutes.
- Reduce the heat to 325° F. Continue cooking the roast until it reaches an internal temperature of 130° F.
- Place the roast on a carving board and tent it lightly with foil. Allow the roast to rest for 20-30 minutes, then carve it and serve.
Notes
You can also make this roast with this Mustard, Garlic & Peppercorn Rub in place of the herbs. There's a recipe for Creamy Horseradish in that post, which is a fantastic addition for this herb rub, too.
Nutrition Information:
Yield: 10 Serving Size: 1Amount Per Serving: Calories: 1328Total Fat: 108gSaturated Fat: 46gTrans Fat: 0gUnsaturated Fat: 49gCholesterol: 326mgSodium: 1002mgCarbohydrates: 2gNet Carbohydrates: 1gFiber: 1gSugar: 0gProtein: 82g
This data was provided and calculated by Nutritionix.
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Donna
Sunday 2nd of January 2022
Highly recommend! I’ve been preparing Prime Rib for over 50 years and decided to try a new recipe. So glad I did, won’t go back to my former method. Thank you for sharing!
Brian Williams
Sunday 2nd of January 2022
Every year for Christmas or New Year I've made this prime rib recipe since I first met Kristy back in 2014. I was traveling this year so I passed it on to a few friends to try. One family made it yesterday and came into the office raving about how delicious it came out and how easy it was to make. I took the credit of saying I have a great recipe that I got from an even better friend!
Kristy Bernardo
Sunday 2nd of January 2022
Aww, love this so much, Brian! Miss you and your wonderful family!
Kathy Ridenour
Sunday 26th of December 2021
I made this for Christmas dinner and it was tender, moist, and very flavorful. This is now saved under my favorites so we can make it every year. I was a little nervous about getting the degree of doneness correct but using a meat thermometer was the key.
Cathy
Friday 25th of December 2020
Does the butter make it smoke a lot? We have trouble with our vent fan and I have to be careful not to get smoke in the kitchen or all the alarms go off. Other than that... this sounds wonderful!
MARK
Friday 30th of December 2022
@Kristy Bernardo, put a cup or 2 if water or water/wine in the bottome of the roaster. It keeps the fat from smoking and jump starts you Au Jus.
Kristy Bernardo
Tuesday 29th of December 2020
Hi Cathy! I've never noticed it smoking but our vent fan works well, so I'm not sure how to advise you on this. I did happen to see a comment this morning left on the Pinterest pin from someone who made it recently; they said that they made a paste out of the garlic and herbs with olive oil in lieu of the butter. That might be a safer route for you. There's also a link in the post above to a garlic-peppercorn rub that I use often as well. Hopefully one of those will pique your interest. Let me know if you try it!
Susie Palmer
Thursday 12th of November 2020
I made this and it was PERFECT