Start by cooking the prime rib at 500 degrees F for 15 minutes. Then, lower the oven temperature to 325 degrees F and cook according to the reference range below. Always use a meat thermometer to ...

Showstopping beef entrees are a great place to start when you’re trying to impress, and few things are as impressive as prime rib ... roast, uncovered, for 15 minutes Reduce the heat to 325°.