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Keto Cajun-Spiced Prime Rib Recipe

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A bold, juicy Cajun-spiced prime rib roast that’s low in carbs and big on flavor. Perfect for keto eaters, holiday dinners, or whenever you want a show-stopping, meaty meal without all the fuss.

Ingredients

Scale

For the Prime Rib:

  • 1 whole bone-in prime rib roast (6–8 lbs)

  • 2 tbsp olive oil or beef tallow

  • 2 tsp kosher salt

  • 1 tsp black pepper

Cajun Spice Rub:

  • 1 tbsp smoked paprika

  • 1 tbsp garlic powder

  • 1 tbsp onion powder

  • 1 tsp cayenne pepper (adjust to taste)

  • 1 tsp dried thyme

  • 1 tsp dried oregano

  • 1 tsp ground white pepper (optional)

  • ½ tsp ground cumin

  • ½ tsp red pepper flakes (optional)

Instructions

  • Let the roast sit at room temperature for 2 hours before cooking.

  • Preheat oven to 225°F.

  • Pat the roast dry with paper towels. Rub with olive oil.

  • Mix Cajun spices in a bowl. Rub the spice mix all over the roast.

  • Place bone-side down in a roasting pan or cast iron skillet.

  • Roast uncovered for 3–4 hours, until internal temp reaches 120°F for rare or 130°F for medium rare.

  • Remove roast and let it rest for 30 minutes.

  • Increase oven temp to 500°F or turn on broiler.

  • Return roast to oven for 5–10 minutes to crisp the crust.

  • Slice against the grain and serve.

Notes

  • Use a meat thermometer to avoid overcooking.

  • Adjust cayenne and red pepper flakes to your heat preference.

  • Letting the roast rest is key to juicy slices.

  • Leftovers keep well in the fridge or freezer.

Nutrition

Find it online: https://www.wellnesswarrior.org/keto-cajun-spiced-prime-rib/