Slow-Roasted Prime Rib recipe served on a plate, by Pekin the Chef
Aug 04 2026
RestaurantsRafferty's Restaurant & BarSlow-roasted Prime Rib Recipe

Slow-roasted Prime Rib Recipe

Time5h
Serves8

Our aged USDA choice prime rib is seasoned then slow-roasted for tenderness and flavor.

Was this page helpful?

Help improve this recipe for others.

Send this recipe to your inbox.

We'll email it straight to you - plus weekly cooking inspiration.

Ingredients

Some product links may be affiliates. If you buy through them, you're supporting the site and Pekin may earn a commission at no extra cost to you.

Main Ingredients

Method

Cooking Instructions

  1. 1

    Prepare the Prime Rib

    Remove prime rib from the refrigerator and let it sit at room temperature for about 1 hour. Preheat your oven to 225°F (107°C).

  2. 2

    Season the Roast

    In a small bowl, combine kosher salt, black pepper, garlic powder, rosemary, thyme, and olive oil. Rub this mixture all over the prime rib, ensuring it’s evenly coated.

  3. 3

    Roast the Prime Rib

    Place the seasoned prime rib on a roasting rack in a roasting pan. Insert a meat thermometer into the thickest part of the roast (avoid touching the bone). Roast in the preheated oven until the internal temperature reaches 130°F (54°C) for medium-rare, about 4-5 hours.

  4. 4

    Rest the Meat

    Once the desired temperature is reached, remove the roast from the oven and cover it loosely with aluminum foil. Let it rest for at least 20-30 minutes before carving.

  5. 5

    Make the Gravy (Optional)

    While the roast is resting, you can make gravy. Pour the drippings from the roasting pan into a saucepan, add beef broth, and bring to a simmer over medium heat. Whisk continuously until slightly thickened.

  6. 6

    Serve

    Carve the prime rib to your desired thickness and serve with the gravy on the side.

More from Rafferty's Restaurant & Bar