If you’re looking for a delicious and easy way to prepare a festive meal for Thanksgiving or Christmas, and you’re all turkey’d out, you might want to consider the Costco seasoned prime rib dinner.

This is a high-quality and tender cut of beef that comes pre-seasoned with garlic, salt & pepper, spices, and olive oil. All you need to do is roast it in the oven following the simple cooking instructions below and enjoy the succulent and juicy meat with your favorite sides.

You can choose from different sizes of the prime rib roast, ranging from 7 to 12 lbs, depending on how many people you want to serve. The rule of thumb is you need 1 pound of bone-in prime rib per adult.

The Costco seasoned prime rib roast is a cost-effective (compared to many grocery stores) and convenient option that will save you time and money while impressing your guests with a luxurious dining experience.

You can find the prime rib roast at Costco during the holiday season, or order it online for delivery. Don’t miss this opportunity to treat yourself and your loved ones to a mouthwatering meal that will make your holidays unforgettable!

The Costco Choice Bone-In Prime Rib is $13.99 per pound (Item #36237). By the way: that’s $0.90 less per pound than in 2022!  They sometimes have Prime quality for around $21-22 per pound.

Costco Bone-In Prime Rib Cooking Instructions:

Traditional Method:

  1. Preheat oven to 500° F
  2. Place prime rib in a shallow roasting pan and place on center rack of oven and cook for about 25 minutes
  3. Turn oven temp down to 350° F
  4. Roast until internal temp is around 115° F*
  5. Remove prime rib from oven and let rest for 20-25 minutes
  6. Cut the twine holding the bone to the roast before slicing and serving

Reverse Sear Method:

  1. Take prime rib out of the refrigerator and let stand at room temp for 60-90 minutes
  2. Preheat oven to 225° F
  3. Place prime rib in a shallow roasting pan and place on center rack of oven and cook until internal temperature of 120° F (a 12 lb prime rib will take 3-4 hrs)
  4. Remove prime rib from oven and let rest for 30 minutes
  5. Turn oven temp up to 500° F
  6. Place prime rib back in oven for about 10 minutes to brown – final internal temp should be around 130° F when you remove it*
  7. Remove prime rib from oven and let rest for about 5 minutes (it needs much less time to rest than the traditional method)
  8. Cut the twine holding the bone to the roast before slicing and serving

*The roast will continue to cook after you remove it and the temp will “coast” to somewhere around 132-135° F by the time you slice and serve. This is perfect medium-rare temperature.

Many people swear that the reverse sear method is far superior to the traditional method. Both will yield tasty results, but the reverse sear should produce a more consistent and uniform doneness throughout the entire roast.

Always use an instant read thermometer for measuring the internal temperature.  Thermapen is the best you can get and used by the pros (but it’s pricy); a very capable but less pricy option is the Lavatools Javelin Pro. Finally, Meater also makes a great bluetooth-enable smart meat thermometer option if you’re looking for more bells & whistles.

Prime Rib Internal Temp

Use these temperatures when making a standing rib roast. The temperature is the same whether you’re making a bone-in or boneless roast.

  • Rare Prime Rib: 120-129°F (Bright red center, lukewarm)
  • Medium Rare: 130-134°F (Bright red center, pink edges, warm)
  • Medium: 135-144°F (Pink and warm throughout)
  • Medium Well: 145-154°F (Slightly pink center and warm throughout)
  • Well Done: 155-164°F (Very little pink)