Julia Child’s Prime Rib Recipe: Classic French Herb-Crusted Roast

This classic prime rib honors Julia Child’s traditional French approach with a simple herb crust and precise roasting technique.

By following her method for slow-roasting at 325°F, you’ll achieve a perfectly tender center with a flavorful crust every time.

Ingredients for Julia Child Prime Rib

Classic French technique meets premium cuts and aromatic herbs for this timeless roast.

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The prime rib is paramount. First-cut bone-in roasts from a reputable butcher like Whole Foods or a local purveyor ensure optimal marbling and flavor. Request the rib bones be left on and the fat cap trimmed to 1/4-inch thickness. For the herbs, organic rosemary and thyme from Trader Joe’s or a farmers market deliver the most vibrant aroma. The beef stock should be homemade or high-quality low-sodium to avoid over-salting.

No red wine? Substitute beef stock with 1 tbsp balsamic vinegar for depth. Fresh herbs are non-negotiable, but dried at one-third the amount works in a pinch. For the mustard, whole-grain Dijon adds texture, but smooth is acceptable. Unsalted butter is critical—salted can make the crust too salty. If shallots are unavailable, yellow onions can be used, though they’re slightly sweeter.

The roast can rest at room temperature for 1 hour before cooking. Leftovers keep beautifully—store sliced in airtight containers for 4-5 days or freeze for 3 months. Reheat gently in au jus to preserve moisture (don’t microwave).

Step-by-Step Instructions for Classic Herb-Crusted Prime Rib

Master the French technique Julia Child perfected for a showstopping centerpiece every time.

Step 1: Prepare the Herb Crust

Finely chop the 3 slices fresh rosemary and strip the leaves from the 3 slices fresh thyme. In a small bowl, combine these with the 6 cloves garlic cloves minced to a paste, 2 tbsp kosher salt, and 2 tsp freshly ground black pepper.

Add the 3 tbsp Dijon mustard, 2 tbsp extra-virgin olive oil, and 4 tbsp unsalted butter to the herb mixture. Stir until it forms a thick, cohesive paste. This aromatic compound will create that signature French crust Julia Child made famous.

Step 2: Apply the Crust and Sear the Roast

Pat the 4 lb prime rib roast completely dry with paper towels. This ensures the herb crust adheres properly and creates a perfect sear. Rub the herb-butter mixture evenly over the entire surface of the roast, pressing it into the meat.

Place the roast fat-side up on a rack in a roasting pan. The fat cap should be on top to baste the meat as it cooks. Let it sit at room temperature for 1 hour to take the chill off before roasting—this promotes even cooking throughout.

Step 3: Roast to Perfection

Preheat your oven to 450°F. Roast the prime rib for 20 minutes at this high temperature to develop a deep, flavorful crust. Then reduce the oven temperature to 325°F and continue roasting.

For medium-rare, cook until an instant-read thermometer inserted into the thickest part of the meat registers 125-130°F. This typically takes 1 to 1.5 hours total, depending on your oven. The crust should be deep brown and fragrant, with the herb mixture forming a beautiful, caramelized exterior.

Step 4: Create the Au Jus

Transfer the roast to a cutting board and tent loosely with foil. Place the roasting pan on the stovetop over medium heat. Add the 2 whole shallots, finely minced, to the pan drippings and cook for 1-2 minutes until softened.

Deglaze the pan with the 0.5 cup dry red wine, scraping up all the browned bits. Add the 1 cup beef stock and simmer for 5-7 minutes until the liquid reduces by half. Strain the au jus through a fine-mesh sieve into a gravy boat for serving alongside the sliced roast.

Step 5: Rest and Serve

Let the prime rib rest for 20-30 minutes before carving. This resting period allows the juices to redistribute throughout the meat, ensuring each slice is moist and flavorful. The internal temperature will rise by 5-10°F during this time.

Carve the roast between the ribs into thick slices, serving each portion with a generous spoonful of the rich au jus. The meat should be rosy pink in the center with a robust herb crust that defines this classic preparation.

Best Sauces and Condiments for This Recipe

Classic Au Jus

The natural pan drippings from this roast create an incredible au jus that needs little enhancement. I simply skim off excess fat, then reduce the juices with 1 cup beef stock and ½ cup red wine for 5-7 minutes until slightly thickened. 🔥

Creamy Horseradish

Julia loved bold flavors, and a creamy horseradish sauce is perfect here. Whisk ½ cup sour cream, 2 tbsp prepared horseradish, 1 tsp Dijon mustard, and 1 tsp lemon juice together. Adjust the horseradish to taste—this adds a delightful kick.

Red Wine Reduction

For a more elegant option, reduce 1 cup dry red wine with 1 minced shallot and 1 cup beef stock until syrupy. Add a 1 tbsp cold butter at the end for gloss. This pairs beautifully with the herb crust.

Garlic-Herb Butter

Mix 4 tbsp softened butter with 1 tbsp chopped rosemary, 1 tbsp chopped thyme, and 1 minced garlic clove. Roll into a log and chill, then slice a pat onto each serving. It melts into the meat beautifully.

Simple Chimichurri

Blend 1 cup parsley leaves, 3 garlic cloves, ¼ cup red wine vinegar, and ½ cup olive oil until chunky. This bright, herby sauce cuts through the richness of the prime rib. 💛

Frequently Asked Questions