A standing rib roast or prime rib is a holiday dinner classic ... Sear first: Preheat the oven to 475 degrees. Place the roast on a rack set in a large roasting pan, fat side facing up.
If you don’t let the meat rest long enough, you could end up with a chewy prime rib roast,” warns Petropoulos. “As the roast rests, the internal temperature will rise 5 - 10 degrees.