Ready in 3 hours 45 minutes (active prep 30 min) . Serves 8-10 . Technique: High-Heat Sear and Low-Temp Roast . Storage: Refrigerate for 4 days.
Roasting a whole Prime Rib is the ultimate centerpiece for the holidays, and this recipe delivers a perfect, rosy-pink interior and a savory, dark crust every time. This method is surprisingly simple for such an expensive cut of meat and is the ultimate main course for your Christmas or New Year's Eve feast.
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My non-negotiable tip: You must pull the roast from the oven when the internal temperature registers 115°F (46°C). This is a crucial technique for large roasts! The temperature will continue to rise by 15-20°F as it rests, ensuring the final serving temperature is a perfect, juicy 130°F-135°F (Medium-Rare).
Why You'll Love This Recipe
- Perfect Rosy Interior: The two-stage cooking method ensures the meat is evenly pink from edge to edge-the hallmark of a professional roast.
- Savory, Crusted Exterior: Starting with a high-heat sear creates a dark, savory crust that locks in flavor.
- Foolproof Technique: Cooking to temperature (not time) and the built-in long rest eliminate guesswork on an expensive cut.
- Elegant Dipping Sauce: The creamy, tangy Horseradish Dipping Sauce provides the perfect, sharp contrast to the rich, savory beef.
Ingredients
Here's what you'll need for this impressive holiday roast.
For the Prime Rib and Rub
- 1 (8-lb.) 4-rib standing rib roast, chine bone removed.
- Seasoning: 2 tsp. kosher salt, 2 tsp. black pepper, 1 tsp. dried thyme, 1 tsp. garlic powder, ½ tsp. ground cumin, ½ tsp. paprika, ½ tsp. ground red pepper.
- Garnish: Thyme sprigs.
For the Horseradish Dipping Sauce
- Dairy Base: 1 cup sour cream and ½ cup mayonnaise.
- Flavour: 5 Tbsp. prepared horseradish (adjust to your spice preference!).
- Umami & Seasoning: 1 tsp. Worcestershire sauce, plus the remaining salt and pepper.
How to Make Prime Rib Roast
Success hinges on time, temperature, and trusting the resting process.
Step 1: Prep and Season the Roast
First, pat the rib roast completely dry with paper towels. Let it stand at room temperature for 2 hours; this is crucial for even cooking.
Carefully remove the ribs from the roast, cutting as close to the bones as possible. Place the roast on top of the detached ribs and tie the two pieces together with kitchen twine . This holds the shape and makes carving easier later.
Place the trussed roast on a wire rack set in a large roasting pan. Rub the dried thyme and 1 ½ teaspoons each of the salt and pepper all over the roast.
Step 2: High-Heat Sear and Low-Roast
Preheat oven to 500°F (260°C) with the rack in the lowest setting. Bake roast in preheated oven for 25 minutes. This creates the initial, dark, savory crust.
Immediately reduce oven temperature to 325°F (160°C). Continue to bake until a thermometer inserted in the thickest portion of the roast registers 115°F (46°C). This will take about 2 hours more.
Step 3: Rest and Slice (Crucial!)
Remove the roast from the oven. Loosely cover it with aluminum foil and let it rest 30 minutes to complete cooking. (The internal temperature will coast up to a safe 135°F).
Remove and discard the kitchen twine. Pull the roast completely off the rib bones, discarding the bones. Slice the roast against the grain into ½-inch thick slices.
Step 4: Prepare and Serve the Sauce
Meanwhile, whisk together the sour cream, mayonnaise, horseradish, and Worcestershire in a medium bowl. Season with the remaining salt and pepper. Cover and refrigerate until ready to use.
Serve the sliced prime rib with the creamy Horseradish Dipping Sauce and garnish with thyme sprigs.
Common Mistakes to Avoid
- Skipping the Rest: If you slice the roast immediately, all the internal juices will run out onto the board, leaving the meat dry. The 30-minute rest is mandatory.
- Using Cold Meat: Putting a cold roast straight into the oven leads to uneven cooking-the outside overcooks while the inside is still raw. The 2-hour rest at room temperature is crucial.
- Ignoring the Thermometer: Do not trust the clock! The only way to guarantee a perfect medium-rare result is to cook to the internal temperature of 115°F (before resting).
Tips and Tricks for Success
- The Thermometer is Your Guide: Pull the roast from the oven when it hits 115°F; it will coast up to 135°F while resting, which is the perfect final temperature for medium-rare.
- The High/Low Sear: Starting the roast at 500°F ensures an immediate, intense sear that builds the dark, savory crust, minimizing the gray band of overcooked meat.
- Use the Wire Rack: Roasting the prime rib on a wire rack allows the hot air to circulate 360 degrees, helping the fat render and ensuring a crust forms on all sides.
- Make the Sauce Ahead: The Horseradish Dipping Sauce is best when made a day ahead, as the flavors intensify while chilling.
Variations
- Garlic Herb Crust: Rub the roast with a paste of minced garlic and fresh rosemary mixed with the salt and pepper.
- Peppercorn Crust: Add 1 tablespoon of coarsely crushed whole peppercorns to the rub for an intense steakhouse flavor.
- Wine Braise: Place 1 cup of dry red wine (like Merlot) in the bottom of the roasting pan, under the rack, to create aromatic steam.
How to Serve
This Prime Rib is the definitive holiday main course.
- Serve in thick medallions alongside Ultra-Fluffy Mashed Potatoes or creamed spinach.
- Offer the Horseradish Sauce on the side for dipping.
- The drippings can be reserved for making a simple Au Jus (sauce).
Make Ahead and Storage
- Make Ahead (Prep): The prime rib can be seasoned and rubbed (Steps 1-2) up to 24 hours in advance. Store uncovered in the refrigerator (a dry brine).
- Make Ahead (Sauce): The Horseradish Dipping Sauce is best made 1 day ahead, covered, and chilled.
- Storage: Store leftovers, tightly wrapped, in the refrigerator for up to 4 days.
- Reheating: Leftover prime rib is best sliced thin and served cold for sandwiches or salads.
Recipe Notes
This two-temperature method is the most reliable way to roast a lean piece of beef. The high-heat sear locks in the flavor, and the long, low-temperature cooking allows the heat to penetrate gently, preventing the outer edges from overcooking. The 30-minute rest allows the meat to retain its tenderness, resulting in a juicy, perfect slice.
Nutrition Snapshot
Estimated Nutrition Per Serving (1/10th of roast, with sauce): 580 calories . 65g protein . 5g carbs .35g fat
Prime Rib With Horseradish Dipping Sauce
Equipment
- Cutting board
- Boning knife
- Kitchen twine
- Large roasting pan with rack
- Medium bowl
- Whisk
- Meat thermometer
- Aluminum foil
Ingredients
Group: Prime Rib
- 1 (8-lb.) 4-rib standing rib roast, chine bone removed
- 1 tsp. dried thyme
- 1 ½ tsp. kosher salt
- 1 ½ tsp. black pepper
Group: Horseradish Dipping Sauce
- 1 cup sour cream
- ½ cup mayonnaise
- 5 Tbsp. prepared horseradish
- 1 tsp. Worcestershire sauce
- ½ tsp. kosher salt
- ½ tsp. black pepper
Group: Garnish
- Thyme sprigs
Instructions
- Pat rib roast dry with paper towels. Place on cutting board, fat side up. Carefully remove ribs from roast, cutting as close to the ribs as possible, following the curve of the bone.
- Place rib roast on detached ribs, tying together with kitchen twine.
- Place trussed roast on a wire rack set in a large roasting pan. Rub dried thyme and 1 ½ teaspoons each of the salt and pepper all over roast. Let stand, uncovered, at room temperature for 2 hours.
- Meanwhile, whisk together sour cream, mayonnaise, horseradish, Worcestershire, and remaining ½ teaspoon each salt and pepper in a medium bowl. Cover and refrigerate until ready to use.
- Preheat oven to 500°F with rack in lowest setting. Bake roast in preheated oven for 25 minutes. Reduce oven temperature to 325°F; bake until thermometer inserted in thickest portion of roast registers 115°F for medium rare (the roast will continue to cook while it rests), about 2 hours. Remove from oven; loosely cover with aluminum foil. Let rest 30 minutes to complete cooking.
- Remove and discard kitchen twine with scissors. Pull roast completely off rib bones, discarding bones; slice into ½-inch thick slices. Serve with horseradish dipping sauce and garnish with thyme sprigs.
Notes
Nutrition
FAQs
Why is the target temperature so low (115°F)?
115°F is the temperature to pull the roast from the oven. This is a necessary technique for large roasts. The mass of the meat will continue to cook as it rests, and the temperature will coast up to the final safe serving temperature of 130°F-135°F (Medium-Rare).
Do I have to tie the roast?
Tying the roast is important because it ensures the meat is uniform in shape, which promotes even cooking throughout the entire cut.
Can I use a boneless roast?
Yes, but the boneless roast will cook much faster. You must insert a thermometer and begin checking the temperature sooner.
