Introduction
Prime Rib French Dip Sandwiches are the ultimate way to transform leftover prime rib into a gourmet, yet deeply comforting, meal, offering a richly savory flavor experience elevated by the classic au jus for dipping. This recipe is incredibly resourceful and turns a holiday centerpiece into a quick, impressive weeknight dinner that everyone will crave.
Key Ingredients for Prime Rib French Dip Sandwiches
Here are the ingredients you’ll need to create these irresistible sandwiches:
For the Sandwiches:
- 2 lbs leftover cooked prime rib, thinly sliced (the thinner, the better for tenderness)
- 4 crusty French rolls or baguette sections (approximately 6-8 inches long), split horizontally
- 8 slices Provolone cheese (or Swiss cheese), thinly sliced
- 2 tablespoons unsalted butter, softened, for spreading on the rolls (optional, but highly recommended for crispness)
- 1 tablespoon olive oil (for assembling)
For the Au Jus (Dipping Sauce):
- 2 cups beef broth (low sodium preferred)
- ½ cup leftover prime rib drippings or reserved au jus (if available, this adds depth)
- 1 small yellow onion, chopped fine
- 2 cloves garlic, minced
- 1 teaspoon Worcestershire sauce
- ½ teaspoon dried thyme
- Salt and freshly ground black pepper to taste
How to Make Prime Rib French Dip Sandwiches
These sandwiches are exceptionally easy to assemble, yielding a tremendously delicious and satisfying meal in under 30 minutes, highlighting the rich, succulent flavor of perfectly cooked prime rib. The preparation time is minimal, as the main protein is already cooked, allowing you to focus on developing the deeply savory au jus and achieving that perfectly melted cheese topping. With warm, buttery toasted bread encasing tender meat and gooey cheese, all ready for a hearty dip, this recipe is guaranteed to become a new favorite.
Step-by-Step Instructions
Step-by-Step Instructions
- Prepare the Au Jus: In a medium saucepan, heat the olive oil over medium heat. Add the chopped onion and sauté until softened and translucent, about 5-7 minutes. Add the minced garlic and dried thyme and cook for 1 minute until fragrant.
- Simmer the Au Jus Base: Pour in the beef broth and the prime rib drippings (if using). Add the Worcestershire sauce. Bring the mixture to a simmer, then reduce the heat to low and let it continue to gently simmer for 15-20 minutes. This allows the flavors to meld beautifully. Taste and season generously with salt and pepper. Keep warm.
- Toast the Rolls: Preheat your broiler or oven to 375°F (190°C). Split the French rolls lengthwise. Spread the softened butter lightly on the inside cut surfaces of the rolls. Place the rolls cut-side up on a baking sheet and toast in the oven for 3-5 minutes until lightly golden and crisp.
- Heat the Prime Rib: Arrange the thinly sliced prime rib in a large oven-safe skillet or on a separate baking sheet. Ladle a small amount of the simmering au jus over the meat slices—about 2-3 tablespoons—to moisten and heat them gently without overcooking. Place the meat in the warm oven for about 5 minutes, or just until heated through.
- Assemble the Sandwiches: Remove the rolls and meat from the oven. Divide the warm prime rib slices evenly among the bottom halves of the toasted rolls. Lay 2 slices of Provolone cheese over the meat on each sandwich.
- Melt the Cheese: Return the assembled bottom halves (of the sandwiches) to the baking sheet. Place them under the broiler for 1-2 minutes. Watch carefully! You want the cheese to be perfectly melted and slightly bubbly, but not burned.
- Serve: Place the top half of the roll onto each sandwich. Transfer the warm au jus into small serving bowls for dipping. Serve the Prime Rib French Dip Sandwiches immediately alongside the warm au jus.
Why You’ll Love This Prime Rib French Dip Sandwiches
You will absolutely adore these Prime Rib French Dip Sandwiches because they represent the ultimate comfort food transformation. The main feature is the phenomenal quality of the repurposed prime rib—tender, perfectly seasoned, and incredibly decadent—which is amplified by the savory, aromatic dipping sauce. Furthermore, making this dish at home offers a significant cost-saving benefit; instead of letting expensive holiday leftovers go to waste, you transform them into four high-end gourmet sandwiches for a fraction of the cost of dining out.
What truly elevates these sandwiches is the contrast between the crusty, buttery roll, the gooey layer of melted Provolone, and the rich, fragrant au jus infused with prime rib drippings and savory herbs. Unlike a standard roast beef sandwich, this one is elevated by that essential dip, ensuring every bite is moist and packed with deep, meaty flavor. This is hearty, satisfying eating at its finest. Don’t settle for boring leftovers—give this recipe a shot tonight!
Storing and Reheating Tips
To store leftovers of the Prime Rib French Dip Sandwiches, it is essential to keep the sandwich components separate. Do not assemble the sandwiches if you plan to save them. Store the leftover prime rib slices tightly wrapped in foil or in an airtight container in the refrigerator for up to 3-4 days. The au jus should be stored separately in its own sealed container and will remain fresh for up to 5 days in the refrigerator. The bread should be stored at room temperature, never refrigerated, or it will become stale quickly.
To reheat, the best method is to gently warm the au jus on the stovetop until simmering. Place the prime rib slices in the warm au jus for a minute or two just to heat them through. If the rolls have softened, toast them lightly under the broiler. Assemble the sandwich with the reheated meat and fresh cheese, then melt the cheese quickly under the broiler before serving immediately with the piping hot au jus. Freezing is not recommended for the assembled sandwich components, though the au jus can be frozen in an airtight container for up to 3 months.
Final Thoughts
These Prime Rib French Dip Sandwiches are more than just a leftover meal; they are an experience—a delicious, easy way to celebrate the luxurious flavor of prime rib in a completely new and exciting format. The irresistible combination of warm, tender meat, melted cheese, and a perfect dipping broth is truly unbeatable. Do yourself a favor, gather those leftovers, and make this spectacular sandwich tonight!
try also :
- Air Fryer Sweet Potatoes
- Crockpot Beef Fajitas
- Ground Turkey Sweet Potato Bake
- Cheesy Pumpkin Stuffed Pretzel Bites
- Find more in Pinterest
- Medium

Prime Rib French Dip Sandwiches
Ingredients
Equipment
Method
- Prepare the Au Jus: In a medium saucepan, heat the olive oil over medium heat.1 tablespoon olive oil
- Add the chopped onion and sauté until softened and translucent, about 5-7 minutes.1 small yellow onion
- Add the minced garlic and dried thyme and cook for 1 minute until fragrant.2 cloves garlic, ½ teaspoon dried thyme
- Simmer the Au Jus Base: Pour in the beef broth and the prime rib drippings (if using). Add the Worcestershire sauce.2 cups beef broth, ½ cup leftover prime rib drippings or reserved *au jus*, 1 teaspoon Worcestershire sauce
- Bring the mixture to a simmer, then reduce the heat to low and let it continue to gently simmer for 15-20 minutes. This allows the flavors to meld beautifully. Taste and season generously with salt and pepper. Keep warm.Salt, freshly ground black pepper
- Toast the Rolls: Preheat your broiler or oven to 375°F (190°C). Split the French rolls lengthwise. Spread the softened butter lightly on the inside cut surfaces of the rolls. Place the rolls cut-side up on a baking sheet and toast in the oven for 3-5 minutes until lightly golden and crisp.4 crusty French rolls or baguette sections, 2 tablespoons unsalted butter
- Heat the Prime Rib: Arrange the thinly sliced prime rib in a large oven-safe skillet or on a separate baking sheet. Ladle a small amount of the simmering *au jus* over the meat slices—about 2-3 tablespoons—to moisten and heat them gently without overcooking. Place the meat in the warm oven for about 5 minutes, or just until heated through.2 lbs leftover cooked prime rib
- Assemble the Sandwiches: Remove the rolls and meat from the oven. Divide the warm prime rib slices evenly among the bottom halves of the toasted rolls. Lay 2 slices of Provolone cheese over the meat on each sandwich.8 slices Provolone cheese (or Swiss cheese)
- Melt the Cheese: Return the assembled bottom halves (of the sandwiches) to the baking sheet. Place them under the broiler for 1-2 minutes. Watch carefully! You want the cheese to be perfectly melted and slightly bubbly, but not burned.
- Serve: Place the top half of the roll onto each sandwich. Transfer the warm *au jus* into small serving bowls for dipping. Serve the Prime Rib French Dip Sandwiches immediately alongside the warm *au jus*.