A bone-in standing rib roast will feed about two people per bone. But if the roast is part of a bigger spread with plenty of other food, you can plan on 1/2 to 3/4 pound of prime rib per person.

For every pound of rib you will need to cook the ribat 500 degrees for 5 minutes,e.g. If your rib is 5.5pounds you will need to cook the rib at 500 for27 1/2 minutes.

Cooking How to Cook a Perfect Prime Rib Roast Step 1: Get an instant-read thermometer. There’s no point in spending money on prime rib if you’re just going to guess when it’s done.

Roast in 350°F oven 1-3/4 to 2-1/4 hours for medium rare; 2-1/4 to 2-3/4 hours for medium doneness. Remove roast when meat thermometer registers 135°F for medium rare; 145°F for medium.

4. Pre-heat the oven to 500 degrees Fahrenheit. 5. Cook rib roast at 500 degrees for 45 minutes. 6. Lower the oven temperature to 325 degrees and cook the roast for another 25 minutes. 7.

No. 7: Set roast in the oven. Leave the roast in the oven until its internal temperature is exactly 130 F. You will know because you left that meat thermometer inserted.

Learn how to make an unforgettable prime rib roast that’s tender, juicy, and packed with rich, beefy flavor. This step-by-step guide covers everything you need—from selecting the right cut and ...