Prime Rib Recipe Slow Roast | Slow-Roasted Bone-In (2024)

Easy Christmas Prime Rib Roast is a staple in winter, making it a wonderful Christmas dinner option or Holiday dinner. All you need for this bone-in prime rib recipe slow roast is a good-sized bone-in rib eye roast, fresh thyme leaves, fresh rosemary, Irish Butter, and a good meat thermometer. Make this sinfully delicious Prime Rib dinner tonight and have delicious leftovers all week!

This best prime rib recipe slow roast recipe is easy to make and tastes delicious due to cooking this rib roast at a low and slow temperature.

You can make this slow-roast rib of beef recipe all year long, but it's especially delightful during the Christmas and Holiday seasons. Want more Christmas recipes? Pair this slow roast rib beef recipe with my Mandarin Orange Ginger Cranberry Sauce recipe and my How To Make Pan Fried Ravioli Recipe or try my Christmas Sangria recipe or my DIY Hot Cocoa Gift Set Jar recipe for the ultimate Holiday menu!

🥩 Ingredients For The Best Slow Roasted Prime Rib

What you need for slow roast prime rib recipe for all special occasions

• Prime Rib Bone In
• Prime Rib and Roast Seasoning ( I highly recommend this brand)
• Irish butter (don't go cheap with your butter, use a high-quality grass-fed butter)
• Fresh thyme
• Fresh Rosemary
• Chunky Sea Salt
• Beef Stock or Beef Broth
• Plastic Wrap
• Sheet Pan
• Meat Thermometer
• Roasting Pan with a roasting rack

See full recipe card below for quantities

The most important item you need for Prime Rib is a good meat thermometer. You can pick one up at your local grocery store or check out my favorite one here.

Low and slow prime rib is easy, delicious, and fuss-free.

You will also need a good roasting pan with a roasting rack.

🥩 Instructions For Slow-Roasted Prime Rib

Step 1: Season roast generously with kosher salt or chunky sea salt and prime Rib seasoning and add slices of butter all around the rib roast.

Step 2: Cover loosely with plastic wrap and refrigerate, for 4-6 hours or overnight if you have time. Don't wrap the plastic wrap too tight.

Step 3: Remove the roast from the refrigerator and allow the prime rib to come to room temperature on a cutting board

Step 4: Preheat the oven to 200 degrees Fahrenheit. (95 degrees C) low temperature

Step 5: In a roasting pan with a wire rack, add sprigs of fresh rosemary, thyme, and beef broth or beef stock to the bottom of the roasting pan. Place the prime rib on top of the wire rack.

Step 6: Bake roast in the preheated oven until internal temperature reaches 115 degrees F (46 degrees C) for medium-rare, about 3 ½ hours. Remove from the oven and tent with aluminum foil; allow to rest, for about 20 minutes.

Step 7: Meanwhile, increase the oven temperature to 500 degrees F (260 degrees C).

Step 8: Once the oven has come up to temperature, uncover the rested roast and return it to the oven. Bake until well-browned, 6 to 10 minutes. Slice with a sharp knife on the fat side. Serve with creamy horseradish sauce or Au jus sauce from the bottom of the roasting pan and enjoy! Enjoy this easy side dish of Mandarin Orange Ginger Cranberry Sauce

🥩Tips and Tricks to Slow Roast Prime Rib

• The general rule of thumb is each pound of the roast is 1-rib. if you get a 5-pound roast, it's going to be five ribs.

• Each of the ribs will generally make about 2-3 steaks which means you'll have loads of leftover prime rib. 😊

• Try and pick out a marbled roast, the more marbling, the better because there is more fat.

• Remove the silver skin on the rib side before roasting to make cutting it easier. Otherwise, you have to fight through that skin when you are cutting between the ribs.

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