Pork Prime Rib Recipe: Herb-Crusted Roast with Rich Au Jus

This herb-crusted pork prime rib delivers restaurant-quality results with a simple yet impressive technique. The key is a well-seasoned crust that forms a flavorful bark while keeping the meat juicy and tender inside.

I’ve perfected this method to ensure the roast cooks evenly, with a golden-brown exterior and a perfectly pink center. The rich au jus, made from the pan drippings, adds depth and elegance to every bite.

What sets this dish apart is the balance of bold herbs and the natural richness of the pork. It’s a showstopper for special occasions without requiring advanced skills.

Serve with roasted vegetables or mashed potatoes to soak up the savory juices. Here’s how to make it at home.

Ingredients for Pork Prime Rib

Restaurant-quality results start with these premium ingredients for a showstopping roast with rich au jus.

The pork prime rib is non-negotiable here. Costco or local butchers offer the best bone-in cuts with consistent marbling. Look for a roast with the fat cap intact—it bastes the meat as it cooks. Diamond Crystal kosher salt is the gold standard for even seasoning distribution. Purchase whole spices and crush them yourself for maximum aroma release (worth the extra minute).

Need to swap the wine? Dry vermouth or additional beef stock with a splash of balsamic vinegar works. Fresh herbs can replace dried at a 3:1 ratio (fresh to dried). If Dijon isn’t available, whole-grain mustard adds a pleasant texture. The butter in the au jus can be omitted for a lighter version, though the richness will be diminished.

Store the raw pork on the bottom shelf of your refrigerator for up to 3 days. The herb mixture keeps in an airtight container for 6 months. Prepared au jus can be refrigerated for 4 days or frozen for 3 months (the fat may separate but reheats well).

Step-by-Step Instructions for Herb-Crusted Pork Prime Rib with Rich Au Jus

Master this technique for a perfectly cooked roast with a flavorful crust and luxurious pan sauce.

Step 1: Prepare the Herb Crust and Season the Roast

In a small bowl, combine the 2 tbsp dried rosemary, 2 tbsp dried thyme, 2 tbsp kosher salt, and 2 tsp freshly ground black pepper. Crush the herbs between your fingers to release their oils and blend them thoroughly with the salt and pepper.

Pat the 4 lb pork prime rib roast completely dry with paper towels. This ensures the crust adheres properly. Rub the roast all over with the 0.25 cup Dijon mustard, then press the herb mixture evenly onto all surfaces, including the fat cap. The mustard acts as a binding agent for the crust.

Step 2: Sear the Roast for Maximum Flavor

Place a large oven-safe roasting pan or Dutch oven over medium-high heat. Add the 0.25 cup olive oil and allow it to shimmer. Sear the roast on all sides until deeply browned, about 3-4 minutes per side. This step builds a flavorful fond that will enrich the au jus later.

Once seared, transfer the roast to a plate and set aside momentarily. In the same pan, add the 2 whole shallots, finely diced, and cook for 2-3 minutes until softened and just beginning to caramelize.

Step 3: Roast to Perfect Doneness

Return the seared roast to the pan, placing it on top of the shallots. Transfer the pan to a preheated 375°F oven. Roast the pork for approximately 1 hour and 15 minutes to 1 hour and 30 minutes, or until the internal temperature reaches 145°F in the thickest part of the meat.

Baste the roast with the pan juices every 20-25 minutes to ensure even cooking and a beautifully browned crust. The roast is ready when the juices run clear and the internal temperature is reached.

Step 4: Craft the Rich Au Jus

Once the roast is done, transfer it to a cutting board and tent loosely with foil to rest for 15-20 minutes. Place the roasting pan on the stovetop over medium heat. Add the 1 cup red wine and deglaze the pan, scraping up all the browned bits with a wooden spoon.

Let the wine reduce by half, then add the 2 cups beef stock and 6 cloves garlic cloves, minced to a fine paste. Simmer for 8-10 minutes until the au jus has thickened slightly. Remove from heat, stir in the 4 tbsp unsalted butter until melted and fully incorporated for a velvety finish.

Step 5: Slice, Garnish, and Serve

Slice the rested roast between the ribs into thick, even portions. Arrange the slices on a serving platter and spoon the rich au jus over the top. Garnish with the 0.25 cup fresh parsley, chopped, for a burst of color and freshness.

Serve immediately with the remaining au jus on the side for dipping. The pork should be tender, juicy, and perfectly seasoned, with a crust that crackles slightly when cut.

Pro Cooking Tips for pork prime rib

Temperature Precision

Use an instant-read thermometer to monitor internal temp—145°F is perfect for medium-rare. I check the thickest part, avoiding bones. A ThermoWorks Mk4 gives accurate readings in 2-3 seconds. 🌡️

Resting Matters

Let the roast rest for 15-20 minutes after removing from the oven. This allows juices to redistribute, ensuring every bite is moist. Tent loosely with foil to keep it warm while you prepare the au jus.

Searing Technique

Sear on medium-high heat until deeply browned—about 3-4 minutes per side. Don’t rush this step; a good sear creates the fond for rich au jus. Use tongs to rotate the roast for even browning.

Basting Secret

Baste every 20-25 minutes with pan juices for a glossy crust. I use a long-handled spoon to avoid opening the oven door too often. This keeps the oven temperature stable and the meat juicy.

Au Jus Perfection

Deglaze with 1 cup dry red wine, scraping up browned bits. Simmer until reduced by half, then add 2 cups beef stock. Finish with 4 tbsp butter for a silky texture. 💛

Slicing Tip

Slice between the ribs for even portions. Use a sharp carving knife, and cut against the grain for maximum tenderness. Serve immediately with au jus spooned over the top.

Frequently Asked Questions