How Long do You Cook Prime Rib?

The time it takes to cook prime rib depends on the weight of your meat. A small portion weighing 4 to 6 pounds will take 60 to 70 minutes. A large 14 to 16 pound prime rib will take up to 3 to 3 1/4 hours. All prime rib should be cooked to rare. Look here for more information: