Why You’ll Love this Slow Roasted Prime Rib Recipe
When it comes to special occasions, nothing beats the rich, mouthwatering flavor of a slow-roasted prime rib. This dish has a way of bringing everyone together, creating an atmosphere filled with warmth and joy.
I love how the aroma fills my home, making it feel inviting and special. The tender, juicy meat practically melts in your mouth, and the crispy, seasoned crust adds an irresistible texture.
Every slice reveals a beautiful, rosy center that makes my guests’ eyes light up. Plus, it’s surprisingly easy to prepare, allowing me to enjoy the celebration instead of being stuck in the kitchen.
Trust me, once you try this recipe, you’ll find yourself making it for every gathering worth celebrating.
Ingredients of Slow Roasted Prime Rib
When you’re gearing up to make a slow-roasted prime rib, the ingredients are the stars of the show. They come together to create that rich, savory flavor we all love. You’ll find that the right combination of herbs and spices really elevates this dish, turning a standard dinner into something extraordinary.
Just imagine the buttery, herb-infused goodness that’ll be spreading across the table. It’s hard not to get excited, right? So, let’s gather what we need to make this culinary masterpiece.
Here’s what you’ll need for your slow-roasted prime rib:
- 6 lbs beef rib roast (3 bone)
- 3 tablespoons unsalted butter, softened
- 3 tablespoons salt
- 2 tablespoons fresh ground black pepper
- 1 teaspoon chopped fresh rosemary leaf
- 1 teaspoon chopped fresh thyme leaves
- 5 garlic cloves, finely chopped
- 2 tablespoons extra virgin olive oil
Now, before you get too far ahead of yourself, let’s talk about a few important considerations.
First off, when selecting your beef rib roast, look for a cut with good marbling. That fat will melt during cooking, keeping the meat juicy and tender—essential for that melt-in-your-mouth experience we all dream about.
Also, don’t skimp on letting the roast come to room temperature before you start cooking; it helps with even cooking and results in a more tender roast.
And, if you’re feeling adventurous, consider adding a splash of red wine or a dash of your favorite steak seasoning to the mix. Cooking should be fun, after all, and a little creativity can go a long way.
How to Make Slow Roasted Prime Rib

Making a slow-roasted prime rib might sound intimidating, but trust me, it’s a lot easier than you think. So, first things first—grab your 6 lbs beef rib roast and let it sit out for about 2 hours before you start cooking. This is vital because a room-temperature roast cooks more evenly.
While that roast is warming up, you can get the seasoning ready. In a small bowl, mix together 3 tablespoons of softened unsalted butter, 3 tablespoons of salt, 2 tablespoons of fresh ground black pepper, 1 teaspoon of chopped fresh rosemary, 1 teaspoon of chopped fresh thyme leaves, and 5 finely chopped garlic cloves. Once that’s all combined, spread this buttery goodness evenly over every side of the roast. Seriously, don’t be shy—make sure it’s all covered. Your future self will thank you.
Now, it’s time to bring on the heat. Preheat your oven to 325 degrees and position the rack in the center. While that’s warming up, heat 2 tablespoons of extra virgin olive oil in a large skillet over medium-high heat. Once it’s hot (but not smoking—no one likes a smoky kitchen), carefully sear the roast in the skillet for about 8-10 minutes, turning it to brown all sides. This step is essential for creating a delicious crust that adds extra flavor.
After you’ve got that perfect golden-brown color, transfer the roast to a roasting pan with the bone side down. Pop it into the oven and let it roast according to your desired doneness: about 2 hours for rare (125 degrees), 2 ¼ hours for medium-rare (135 degrees), or 2 ½ hours for medium (145 degrees).
Once your roast reaches the right temperature, pull it out and let it rest for at least 15 minutes before carving. This resting period is like a mini vacation for your roast, allowing the juices to redistribute so that every slice is juicy and tender.
While you’re waiting, you can take a moment to admire your culinary creation and maybe even pat yourself on the back. You did it! Now, slice that prime rib and serve it up—your family and friends are going to be so impressed. Just remember to take a taste before serving; you know, for quality control. Enjoy!
Slow Roasted Prime Rib Substitutions & Variations
Now that you’ve mastered the art of slow-roasting a prime rib, it’s time to explore some substitutions and variations that can elevate your dish even further.
If you want a twist, consider using a different herb blend—oregano, sage, or even a spicy Cajun mix can add a unique flair.
Instead of butter, try using a compound made with olive oil and balsamic vinegar for a tangy finish.
For a smoky flavor, rub the roast with smoked paprika or chipotle powder.
If you’re looking for a more decadent touch, add some sliced truffles to the garlic mixture.
Finally, don’t shy away from experimenting with different cuts of beef, like a ribeye or sirloin, while adjusting cooking times accordingly.
What to Serve with Slow Roasted Prime Rib
While considering what to serve with slow roasted prime rib, I often find that classic sides enhance the meal beautifully.
Creamy mashed potatoes are a must; they soak up the delicious juices from the meat. I also love serving garlic green beans for a fresh, vibrant touch.
Roasted root vegetables add a lovely sweetness, while a rich, savory gravy ties everything together. For a touch of elegance, a simple arugula salad drizzled with balsamic vinaigrette brightens the plate.
Don’t forget warm dinner rolls to complement the roast! Pairing the meal with a full-bodied red wine, like Cabernet Sauvignon, takes the dining experience to another level.
Each of these sides brings out the flavors of the prime rib, making it a memorable feast.
Additional Tips & Notes
To guarantee your slow roasted prime rib turns out perfectly, I recommend investing in a good meat thermometer. This tool will help you achieve your desired doneness without the guesswork.
Remember to let your roast rest for at least 15 minutes before carving; this allows the juices to redistribute, resulting in a juicier cut.
If you want a beautiful crust, consider adding a bit of Dijon mustard to the butter mixture for extra flavor. Also, don’t hesitate to experiment with herbs and spices to customize the taste to your liking.
Finally, save any leftovers! They make for delicious sandwiches or can be repurposed in other dishes. Enjoy your perfectly cooked prime rib roast!