Cast-Iron Skillet Prime Rib Roast and Gravy: A Culinary Masterpiece

Few dishes command the same level of admiration and reverence as a perfectly cooked Prime Rib Roast. And when it’s prepared in a cast-iron skillet, the results are nothing short of spectacular. The intense heat, the sizzling sound, and the rich, savory aroma that fills your kitchen create an experience that’s as satisfying as the meal itself. In this blog post, we will take you on a culinary journey to prepare a Cast-Iron Skillet Prime Rib Roast and Gravy that’s sure to leave your family and guests in awe. Whether you’re a fan of classic recipes or looking for keto and low-carb options, this recipe is a celebration of culinary excellence.


To create this culinary masterpiece, you’ll need the following ingredients:

For the Prime Rib Roast:

  • 4-5 pounds bone-in prime rib roast
  • 2 tablespoons olive oil
  • 2 tablespoons fresh rosemary, chopped
  • 2 tablespoons fresh thyme, chopped
  • Salt and black pepper to taste

For the Gravy:

  • 2 tablespoons butter
  • 2 tablespoons all-purpose flour (or almond flour for keto version)
  • 2 cups beef broth
  • Salt and black pepper to taste


1. Prepare the Roast:

  • Take the prime rib roast out of the refrigerator and let it sit at room temperature for about 1-2 hours before cooking.
  • Preheat your oven to 450°F (232°C).

2. Season the Roast:

  • Rub the roast with olive oil, ensuring it’s evenly coated.
  • Sprinkle the fresh rosemary, thyme, salt, and black pepper all over the roast, pressing gently to adhere the herbs.

3. Heat the Cast-Iron Skillet:

  • Place the cast-iron skillet in the preheated oven for 10-15 minutes, until it’s scorching hot.

4. Sear the Roast:

  • Carefully remove the skillet from the oven and place it on the stovetop over high heat.
  • Sear the roast on all sides until it’s browned and crusty, which should take about 5 minutes per side.

5. Roast in the Oven:

  • Transfer the skillet with the roast back to the oven and reduce the temperature to 325°F (163°C).
  • Roast the prime rib for approximately 15 minutes per pound for medium-rare, or until it reaches your preferred level of doneness.

6. Rest and Carve:

  • Remove the roast from the skillet and let it rest for at least 15 minutes. This allows the juices to redistribute.
  • Slice and serve the prime rib roast, garnishing with fresh herbs if desired.

For the Gravy:

1. Make a Roux:

  • In a saucepan, melt the butter over medium heat.
  • Stir in the all-purpose flour (or almond flour for keto) and cook for a couple of minutes, creating a smooth roux.

2. Add Beef Broth:

  • Gradually pour in the beef broth while whisking constantly to avoid lumps.
  • Cook until the gravy thickens, which should take about 5 minutes.
  • Season with salt and black pepper to taste.

3. Serve:

  • Pour the rich and savory gravy over your sliced prime rib roast for the ultimate finishing touch.

Cooking Notes 

  • Letting the roast come to room temperature before cooking ensures even cooking and a juicier end result.
  • Use a meat thermometer to monitor the roast’s internal temperature for precise doneness.


  • Experiment with different herb combinations, such as oregano and garlic for a Mediterranean twist.
  • Create a spicy crust by adding cayenne pepper or crushed red pepper flakes to the seasoning.

Keto Version  For a keto-friendly adaptation, substitute almond flour for all-purpose flour when making the gravy. Ensure that your beef broth is keto-compliant and the roast is not coated with any sugary marinades. This keto version lets you savor the succulent perfection of Cast-Iron Skillet Prime Rib Roast while staying faithful to your low-carb dietary goals.

Low-Carb Version  To craft a low-carb version, replace the all-purpose flour with almond flour in the gravy. Verify that your beef broth and prime rib roast align with low-carb standards, avoiding added sugars. This adaptation allows you to indulge in the exquisite flavor of Cast-Iron Skillet Prime Rib Roast while maintaining your low-carb lifestyle.

Cast-Iron Skillet Prime Rib Roast and Gravy is a culinary masterpiece that will leave a lasting impression on your taste buds and guests. Whether you choose the classic recipe or explore keto and low-carb options, this dish is a celebration of flavor, tradition, and elegance. Prepare it with love, gather your loved ones, and revel in the perfection of Cast-Iron Skillet Prime Rib Roast and Gravy.

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