Ingredients
Equipment
Method
- Remove the prime rib from the refrigerator 2 to 3 hours before cooking to allow it to reach room temperature.
- Preheat your oven to 450°F (230°C). In a small bowl, combine the softened butter, minced garlic, kosher salt, chopped thyme, chopped rosemary, and black pepper. Mix well.
- Once the prime rib has reached room temperature, pat it dry with paper towels. Rub the herb butter mixture evenly over the entire outside of the roast.
- Place the prime rib, bone-side down and fat-side up, in an oven-safe pan or roasting tray. If making the red wine au jus, place quartered onion slices in the pan around the meat. Otherwise, you can omit the onions.
- Cook the prime rib in the center of the preheated oven for 20 minutes at 450°F (230°C) to achieve a good sear. Then, reduce the oven temperature to 325°F (160°C) and continue cooking until the internal temperature reaches 120°F (50°C) for medium-rare. This typically takes about 1.5 hours, but cooking time will vary based on the size of your roast and your oven. Use a meat thermometer for accuracy.
- Remove the prime rib from the oven and let it rest for 20 to 30 minutes. You can tent it loosely with aluminum foil to keep it warm. After resting, remove the string and bones, then slice the prime rib into ½-inch thick pieces.
Notes
For the optional Red Wine Au Jus: After removing the prime rib from the pan, pour the drippings into a saucepan. Add beef broth and red wine. Bring to a simmer and cook for about 10 minutes. If you prefer a thicker sauce, whisk in the cornstarch or arrowroot powder slurry and simmer until thickened.
