is prime rib the same as rib roast?
A prime rib roast, or standing rib roast, is cut from the back of the upper rib section of the steer, and it usually comprises a total of seven ribs. To make the Slow-Roasted Prime Rib recipe, you'll need a three-bone rib roast, which can be cut either from the chuck end or the loin end of the rib section.