Remove the prime rib from the fridge and let it sit at room temperature for about two hours. This helps it cook evenly and stay juicy.
Preheat your oven to 220°C (430°F). Meanwhile, pat the roast dry with paper towels; this helps achieve a good sear.
Mix together the salt, pepper, and garlic powder, then rub the mixture all over the roast generously, especially on all sides to build a flavorful crust.
Heat a heavy skillet over high heat until shimmering and slightly smoking. Brush the roast with olive oil to help it sear evenly.
Sear the prime rib on all sides, about 3-4 minutes per side, until deeply browned and fragrant. You should hear a satisfying sizzle and see a rich, caramelized crust forming.
Transfer the seared roast to a roasting pan fitted with a rack. Insert a meat thermometer into the thickest part of the meat.
Roast the meat at 220°C (430°F) for about 15 minutes, then reduce the oven temperature to 160°C (320°F). Continue roasting until the internal temperature reaches 50-52°C (122-125°F) for rare doneness, which takes about 60-75 minutes.
Remove the roast from the oven and tent loosely with aluminum foil. Let it rest for at least 20 minutes; this allows the juices to redistribute, ensuring a tender, juicy bite.
Carve the prime rib against the grain into thick slices, revealing a rosy, succulent interior with a beautifully crusted exterior.
Serve the slices warm, accompanied by your favorite sides, and enjoy the rich, tender flavor of this classic holiday centerpiece.