Pat the prime rib dry using paper towels. Rub it with the olive oil and then sprinkle on the garlic powder, onion powder, thyme, black pepper, and salt.
Place the prime rib on a roasting pan and put it in the preheated oven. Roast for 15 minutes and then reduce the oven temperature to 325 degrees F.
Continue to roast for 1 hour and 15 minutes, or until the internal temperature of the prime rib reaches 135 degrees F for medium-rare.
Remove the prime rib from the oven and let it rest for 10 minutes before slicing and serving.
Interesting Facts
Prime rib is a cut of beef from the rib section.
Prime rib is typically served with horseradish and au jus.
The USDA recommends an internal temperature of 145 degrees F for prime rib.
Leftover prime rib can be used in sandwiches, salads, or soups.