Chef Khristianne U on Instagram: "Prime Rib Roast 🥩 500 for 5 Method. Full Recipe in Caption 🖤 The 500-Degree Method. The core formula is to roast the prime rib at 500°F for exactly 5 minutes per pound, then turn the oven off and leave the roast undisturbed for two-3 hours. This method works by using a high initial heat to sear the outside and then allowing the retained heat in the turned-off oven to cook the interior gently and evenly. Remove the prime rib from the refrigerator 4-5 hours befo