With that in mind, assuming you’re starting with a prime rib roast that has an internal temperature of 38° (just out of the refrigerator), LaFrieda says the basic formula for perfect medium ...

When ordering the rib from the butcher ask for a roast with the best marbling. Leave your roast out of the refrigerator long enough for it to be at room temperature. Preheat your oven to 500 degrees.

Roast the prime rib at 450°F (232°C) for 20-25 minutes to develop a golden, aromatic crust. Reduce the Temperature Lower the oven temperature to 325°F (163°C) and continue roasting.

With that in mind, assuming you’re starting with a prime rib roast that has an internal temperature of 38° (just out of the refrigerator), LaFrieda says the basic formula for perfect medium-rare prime ...

How To Reverse Sear Prime Rib. Reverse searing is a great way to ensure that you have an evenly cooked roast with a great crust and no band of overcooked meat between the two, says LaFreida.