(Just keep an eye on that meat thermometer!) Total prime rib cook time: 5-6 minutes per pound at 500 degrees, then 2 hours with oven off and door closed. Remove the finished roast from your oven ...

How long does it take to cook a prime rib roast? Estimate about 15 minutes of cooking time per pound of prime rib. An 8- to 9-pound rib roast will take about two to three hours to cook.

“Prime rib roast is also called a standing ... then reduce heat to 325-350° F for the duration of the cooking time, approximately 12-15 minutes per pound. This ensures the meat in the center ...