Introduction
Slow Roasted Prime Rib is a show-stopping, melt-in-your-mouth main dish perfect for special occasions, holiday dinners, or any time you want to impress your guests. This recipe allows the prime rib to roast low and slow, ensuring tender, juicy meat with a perfectly crispy exterior. The seasoning enhances the natural flavor of the beef without overpowering it, making each bite a flavorful experience. Whether you’re serving it for a festive meal or a family gathering, Slow Roasted Prime Rib will be the star of the table.
I remember the first time I made this for a holiday dinner. The aroma filled the house as the prime rib slowly roasted, and when it was finally ready, everyone gathered around the table in awe. The meat was so tender that it practically melted in your mouth, and the crispy outer crust added the perfect texture. It quickly became a family favorite, and now it’s a go-to dish whenever we have a special celebration. There’s something about how effortlessly impressive it looks and tastes that makes it the perfect choice for making any occasion feel even more memorable.
Perfect for:
- Holiday dinners (Christmas, Easter, Thanksgiving)
- Family gatherings
- Special celebrations
- Beef lovers
- Gourmet meals
Why You’ll Love This Recipe
Here’s why Slow Roasted Prime Rib is the ultimate main dish:
- Tender and Juicy: The slow-roasting method ensures the beef remains juicy and tender, with the fat rendering beautifully during the process.
- Crispy, Flavorful Crust: The outside develops a perfect, savory crust that seals in all the flavors, giving you a satisfying contrast to the tender meat inside.
- Simple Seasoning: With just a few seasonings like garlic, herbs, and olive oil, the beef’s natural flavor shines through.
- Perfect for Large Gatherings: This recipe makes a generous portion that’s perfect for feeding a crowd, yet is simple to prepare and cook.
- No-Fuss Cooking: Once your prime rib is seasoned and placed in the oven, it mostly cooks itself, leaving you free to focus on other aspects of your meal.
Preparation and Cooking Time
- Total Time: 4 hours (including resting time)
- Preparation Time: 15 minutes
- Cooking Time: 3 hours
- Resting Time: 30 minutes
- Servings: 8-10 servings
- Calories per serving: Approximately 450-550 calories
- Key Nutrients: Protein: 40g, Carbs: 0g, Fat: 35g
Ingredients
Gather these ingredients to make your Slow Roasted Prime Rib:
For the Prime Rib:
- 1 (5-7 lb) bone-in prime rib roast
- 3 tablespoons olive oil
- 4 cloves garlic, minced
- 1 tablespoon fresh rosemary, chopped
- 1 tablespoon fresh thyme, chopped
- 1 tablespoon salt
- 1 teaspoon freshly ground black pepper
- 1 teaspoon onion powder
- 1 teaspoon garlic powder
Ingredient Highlights
- Prime Rib Roast: The star of the dish, this cut of beef is known for its rich flavor and tenderness when cooked properly.
- Fresh Herbs: Rosemary and thyme add a fragrant, earthy flavor that complements the beef.
- Olive Oil: Helps create a golden, crispy crust while keeping the roast moist.
- Garlic: Adds a savory depth of flavor, enhancing the beef’s natural taste.
- Seasoning: Salt, pepper, onion powder, and garlic powder round out the seasoning, providing the perfect balance of savory flavors.
Step-by-Step Instructions
Here’s how to make Slow Roasted Prime Rib:
Prepare the Prime Rib:
- Season the Meat: In a small bowl, combine olive oil, minced garlic, rosemary, thyme, salt, pepper, onion powder, and garlic powder. Rub this seasoning mixture all over the prime rib, making sure to coat every surface of the roast.
- Let the Meat Sit: Let the seasoned prime rib sit at room temperature for 30-60 minutes. This helps ensure more even cooking.
Roast the Prime Rib:
- Preheat the Oven: Preheat your oven to 450°F (232°C).
- Sear the Roast: Place the prime rib roast on a rack in a roasting pan, fat side up. Roast the prime rib at 450°F (232°C) for 15 minutes to create a nice crust on the outside.
- Reduce the Temperature: After 15 minutes, reduce the oven temperature to 325°F (163°C). Continue roasting the prime rib for about 2.5 to 3 hours, or until a meat thermometer inserted into the center of the roast reads 120-125°F (49-52°C) for rare, 130°F (54°C) for medium-rare, or 140°F (60°C) for medium.
- Check the Temperature: Begin checking the temperature 30 minutes before the expected cooking time to avoid overcooking.
Rest the Roast:
- Rest the Meat: Once the roast reaches your desired temperature, remove it from the oven and tent it loosely with foil. Let it rest for 30 minutes before slicing. This allows the juices to redistribute, ensuring a juicy roast.
Slice and Serve:
- Carve the Roast: After resting, slice the prime rib against the grain into thick slices.
- Serve: Serve the prime rib with your favorite side dishes, such as roasted vegetables, mashed potatoes, or a fresh green salad.

How to Serve
Slow Roasted Prime Rib is a versatile main dish that pairs wonderfully with a variety of sides:
- With Roasted Vegetables: Roasted carrots, potatoes, or Brussels sprouts complement the rich flavors of the beef.
- With Mashed Potatoes: Creamy mashed potatoes make the perfect side to soak up the prime rib’s savory juices.
- With a Green Salad: A light, refreshing salad adds balance to the richness of the meat.
- With Au Jus or Horseradish Sauce: Serve with a simple au jus made from the roast drippings or a creamy horseradish sauce for an extra layer of flavor.
Additional Tips
Here are some tips to ensure your Slow Roasted Prime Rib turns out perfectly:
- Use a Meat Thermometer: A meat thermometer is key to ensuring the roast reaches your desired level of doneness without overcooking.
- Rest the Meat: Don’t skip the resting period. It ensures your roast stays juicy and tender.
- Searing at the Start: The initial high-heat roasting helps create a flavorful crust, so don’t skip this step.
- Adjust the Cooking Time: Cooking times may vary depending on the size of your roast. Plan for about 15 minutes per pound at 325°F (163°C) after searing.
Recipe Variations
Here are some variations you can try for Slow Roasted Prime Rib:
- Herb-Crusted Prime Rib: Use additional herbs like sage or oregano for a more aromatic crust.
- Garlic Butter Prime Rib: Baste the roast with garlic butter during the last 30 minutes of roasting for a rich, buttery flavor.
- Spicy Prime Rib: Add chili powder or smoked paprika to the seasoning mix for a subtle heat and smokiness.
- Reverse Sear Prime Rib: Reverse sear by starting at a low temperature (250°F or 121°C) and finishing with a high-temperature sear to achieve a uniform, tender roast with a crispy crust.
- Prime Rib with Mushrooms: Top the roast with sautéed mushrooms and onions for a rich, savory complement to the beef.
Freezing and Storage
- Freezing: You can freeze leftover prime rib by slicing it into portions and wrapping it tightly in plastic wrap or foil. Store in an airtight container or freezer bag for up to 3 months. Thaw in the fridge overnight before reheating.
- Storage: Store leftover prime rib in the refrigerator for up to 3-4 days. Reheat in a low-temperature oven or on the stovetop to preserve its tenderness.
Special Equipment
Here are some special equipment items to make preparing your Slow Roasted Prime Rib easier:
- Roasting Pan: A heavy-duty roasting pan with a rack will help cook the prime rib evenly.
- Meat Thermometer: An instant-read meat thermometer ensures the roast is cooked to perfection.
- Sharp Knife: A sharp carving knife is essential for slicing the prime rib thinly and neatly.
- Basting Brush: If you’re basting with garlic butter or another glaze, a basting brush will be helpful.
FAQ Section
- How can I achieve a crustier exterior?
For a thicker, crispier crust, you can roast the prime rib at 500°F (260°C) for 10 minutes before lowering the temperature to 325°F (163°C). - Can I cook prime rib in advance?
Yes, you can cook the prime rib a day ahead, then store it in the refrigerator. Reheat it gently in the oven before serving. - What should I do if my prime rib is too rare?
If it’s too rare for your liking, return it to the oven and cook it at 325°F (163°C) for additional 15-20 minute increments until it reaches the desired temperature. - Can I cook a prime rib roast with the bone removed?
Yes, you can cook a boneless prime rib roast. It will cook faster, so be sure to monitor the temperature carefully.
Slow Roasted Prime Rib
- Prep Time: 15 minutes
- Cook Time: 3 hours
- Total Time: 4 hours (including resting time)
Ingredients
For the Prime Rib:
- 1 (5-7 lb) bone-in prime rib roast
- 3 tablespoons olive oil
- 4 cloves garlic, minced
- 1 tablespoon fresh rosemary, chopped
- 1 tablespoon fresh thyme, chopped
- 1 tablespoon salt
- 1 teaspoon freshly ground black pepper
- 1 teaspoon onion powder
- 1 teaspoon garlic powder
Instructions
Prepare the Prime Rib:
- Season the Meat: In a small bowl, combine olive oil, minced garlic, rosemary, thyme, salt, pepper, onion powder, and garlic powder. Rub this seasoning mixture all over the prime rib, making sure to coat every surface of the roast.
- Let the Meat Sit: Let the seasoned prime rib sit at room temperature for 30-60 minutes. This helps ensure more even cooking.
Roast the Prime Rib:
- Preheat the Oven: Preheat your oven to 450°F (232°C).
- Sear the Roast: Place the prime rib roast on a rack in a roasting pan, fat side up. Roast the prime rib at 450°F (232°C) for 15 minutes to create a nice crust on the outside.
- Reduce the Temperature: After 15 minutes, reduce the oven temperature to 325°F (163°C). Continue roasting the prime rib for about 2.5 to 3 hours, or until a meat thermometer inserted into the center of the roast reads 120-125°F (49-52°C) for rare, 130°F (54°C) for medium-rare, or 140°F (60°C) for medium.
- Check the Temperature: Begin checking the temperature 30 minutes before the expected cooking time to avoid overcooking.
Rest the Roast:
- Rest the Meat: Once the roast reaches your desired temperature, remove it from the oven and tent it loosely with foil. Let it rest for 30 minutes before slicing. This allows the juices to redistribute, ensuring a juicy roast.
Slice and Serve:
- Carve the Roast: After resting, slice the prime rib against the grain into thick slices.
- Serve: Serve the prime rib with your favorite side dishes, such as roasted vegetables, mashed potatoes, or a fresh green salad.
Nutrition
- Serving Size: 8-10 servings
- Calories: 450-550
- Fat: 35g
- Carbohydrates: 0g
- Protein: 40g
Conclusion
Slow Roasted Prime Rib is the ultimate indulgence, delivering melt-in-your-mouth tenderness with a beautifully crispy exterior that will have everyone at the table asking for seconds. Whether it’s for a holiday feast, a special celebration, or just because, this roast is guaranteed to be the star of the meal.
With just a few simple seasonings and a slow-roasting technique, you’ll achieve a prime rib that’s perfectly cooked, juicy, and packed with rich flavor. It’s an impressive dish that’s as satisfying to make as it is to enjoy.
I’d love to see how your Slow Roasted Prime Rib turns out! Snap a photo, share it on social media, and don’t forget to tag me—I can’t wait to see your delicious creations. Enjoy every savory bite!