If you’re craving a hearty, melt-in-your-mouth sandwich that’s surprisingly easy to make, these Slow Cooker French Dip Sandwiches with Au Jus Recipe are going to be your new favorite. Tender roast beef, savory onions, and that irresistible dipping sauce all come together effortlessly.

Two long sandwiches on a wooden board with a dark metal handle, each sandwich has a light brown soft bun with a beef patty inside, topped with a slice of melted white cheese sprinkled with small bits of green herbs. Behind one sandwich is a white bowl filled with dark brown broth. Small green herb sprigs lie beside the sandwiches on the board. The surface under the board is not visible clearly but the focus is on the sandwiches and bowl photo taken with an iphone --ar 2:3 --v 7

Jump to:

Why You'll Love This Recipe
Ingredients & Why They Work
Make It Your Way
Step-by-Step: How I Make Slow Cooker French Dip Sandwiches with Au Jus Recipe
Top Tip
How to Serve Slow Cooker French Dip Sandwiches with Au Jus Recipe
Make Ahead and Storage
Frequently Asked Questions:
Final Thoughts
Slow Cooker French Dip Sandwiches with Au Jus Recipe

Why You'll Love This Recipe

I’ve made French dip sandwiches plenty of ways, but this slow cooker method is my go-to when I want to set it and forget it without sacrificing flavor or tenderness. Plus, the au jus is so rich and comforting—it just elevates the whole experience.

Effortless Slow Cooking: Toss the beef and aromatics in the slow cooker and let time do the work while you relax.
Perfectly Tender Meat: The beef chuck roast becomes fork-tender and easy to slice thin for sandwiches every time.
Flavorful Au Jus: Made from the slow cooker drippings, this rich broth is perfect for dipping each bite.
Easy Homemade Touches: Horseradish mayo and melted provolone add just the right kick and creaminess.

Ingredients & Why They Work

Before you get cooking, let’s break down the key ingredients you’ll want on hand—and a couple tips about choosing them. The beef chuck roast is the star here, so look for a nicely marbled piece that’ll stay juicy through slow cooking.

Flat lay of a whole boneless beef chuck roast with a natural browned crust, a small white bowl of extra-virgin olive oil, coarse kosher salt crystals scattered neatly, freshly ground black peppercorns in a small white bowl, a small white bowl of all-purpose flour, a small white bowl filled with rich beef broth, a small white bowl with dark Worcestershire sauce, two halved and thinly sliced medium yellow onions, three fresh sprigs of thyme, one single fresh bay leaf, three fresh French sandwich rolls arranged symmetrically, a small white bowl of creamy mayonnaise, a small white bowl of pale horseradish sauce, four slices of provolone cheese laid flat; all perfectly balanced and spaced on a clean white marble surface, soft natural light, photo taken with an iPhone, professional food photography style, fresh ingredients, white ceramic bowls, no bottles, no duplicates, no utensils, no packaging --ar 2:3 --v 7 --p m7354615311229779997

Beef chuck roast: A well-marbled, boneless cut that becomes tender and flavorful over slow cooking.
Extra-virgin olive oil: Used for searing the beef, which locks in flavor and adds a beautiful crust.
Kosher salt: Essential for seasoning and enhancing the natural flavors of the meat.
Freshly ground black pepper: Adds just the right amount of kick and depth.
All-purpose flour: Helps create a light crust on the roast and thickens the au jus.
Beef broth with beef base and bone broth: This rich broth forms the foundation of the au jus.
Worcestershire sauce: Brings umami and tangy notes to the cooking liquid.
Yellow onions: Sliced and cooked with the beef, adding sweetness and texture.
Fresh thyme: Aromatic herb for subtle earthiness.
Bay leaf: Adds depth and complexity to the broth’s flavor.
French sandwich rolls: Soft yet sturdy rolls that hold up to soaking in au jus without falling apart.
Mayonnaise: Forms the creamy base for the horseradish mayo spread.
Horseradish: Adds a zesty, spicy kick to the mayo.
Provolone cheese: Melts beautifully over the beef, adding creamy, savory richness.

📝

Note: You'll find the complete list of ingredients, along with their exact measurements, in the printable recipe card at the bottom of this post.

Make It Your Way

One of the best things about this Slow Cooker French Dip Sandwiches with Au Jus Recipe is how easy it is to customize. Whether you want to switch up the cheese, dial up the horseradish kick, or make it friendlier to certain dietary needs, there are plenty of ways to make it your own.

Variation: I love swapping provolone for Swiss cheese sometimes, especially when I want a milder, creamier melt. It pairs beautifully with the horseradish mayo and adds a subtle twist that keeps the classic vibe intact.
Make it spicy: For those who like a little heat, stirring in a pinch of cayenne pepper into the horseradish mayo really wakes up the sandwich without overpowering the savory beef.
Low-carb option: Use lettuce wraps instead of French rolls to keep it low-carb but still enjoy all the rich flavors and tender beef.
Seasonal herbs: When thyme isn't available fresh, try adding rosemary or oregano to the slow cooker for a slightly different herbal aroma that pairs perfectly with the beef.
Make-ahead tip: This recipe is fantastic for meal prep—you can refrigerate leftovers for a quick reheat or freeze portions for weeks of easy dinners.

Step-by-Step: How I Make Slow Cooker French Dip Sandwiches with Au Jus Recipe

A close-up image of a sandwich being held by a man's hand just above a white bowl filled with rich brown broth. The sandwich has a soft, light brown bun sliced open, with visible layers of tender brown meat and melted white cheese inside. Behind, there are more similar sandwiches arranged on a wooden board, all with melted cheese sprinkled with bits of green herbs on top. The setting is on a wooden surface with a white marbled texture in the background. photo taken with an iphone --ar 2:3 --v 7

Step 1: Season and Flour Your Roast

Start by generously seasoning your 2 ¼ lb beef chuck roast all over with kosher salt and freshly ground black pepper. This step is essential to bring out the beef’s natural flavor. Then, lightly coat the entire roast with 2 tablespoons of all-purpose flour. The flour not only helps create a lovely crust when searing but also gently thickens the au jus later. Be sure to pat the flour on evenly—this little step makes a big difference!

Step 2: Sear the Roast to Brown It Beautifully

If your slow cooker insert has a sear function, preheat that. Otherwise, grab a heavy pan like a cast iron skillet or Dutch oven and heat it over medium-high heat. Add 1 tablespoon of extra-virgin olive oil, then sear the roast on all sides for about 3 to 4 minutes per side. Look for an evenly browned, caramelized crust—that’s where the rich flavor develops. Once browned, remove the roast and set it aside for the next step.

Step 3: Add Broth and Aromatics to the Slow Cooker

In your slow cooker insert, combine 4 cups of beef broth made with Zoup! Good, Really Good® Culinary Concentrate™️ Beef Base with Bone Broth, 3 tablespoons Worcestershire sauce, 2 medium yellow onions (halved and sliced into ¼-inch pieces), 3 sprigs of fresh thyme, and 1 bay leaf. Nestle the beautifully seared roast into this flavorful liquid along with the onions and herbs for maximum aromatics.

Step 4: Slow Cook to Fork-Tender Perfection

Cover and cook on HIGH for 3 to 4 hours or on LOW for 6 to 8 hours until the meat becomes fork-tender and easy to shred. The slow, gentle cooking infuses the roast with the savory broth, softening the beef and melding the flavors.

Step 5: Slice the Beef Nicely

Carefully transfer the hot roast to a cutting board. Using a sharp knife, slice the beef into ¼-inch thick slices. This thickness keeps each piece tender and perfect for piling onto your rolls.

Step 6: Prepare the Au Jus and Return Ingredients to Slow Cooker

Strain the broth from the slow cooker into a bowl to remove the bay leaf and thyme sprigs. Return the sliced onions and beef back to the slow cooker. Add just enough of the strained broth to keep the meat moist and flavorful. Meanwhile, keep the reserved au jus warm separately—season with salt and pepper as needed for that perfect dipping experience.

Step 7: Toast the Rolls and Whisk Horseradish Mayo

Toast 6 French sandwich rolls until they are golden brown and just a little crisp. While the rolls toast, stir together 3 tablespoons mayonnaise and 3 teaspoons horseradish in a small bowl until smooth and creamy. This tangy mayo spread adds a wonderful bite that complements the rich beef.

Step 8: Assemble, Broil, and Serve

Spread a thin layer of your horseradish mayo on each toasted roll. Layer on the thin slices of beef, a generous spoonful of the softened onions, and top with 4 slices of provolone cheese divided among the sandwiches. Place the sandwiches under a preheated broiler for about 1 to 2 minutes until the cheese melts and bubbles beautifully. Serve each sandwich hot alongside a small bowl or cup of warm reserved au jus—dip and enjoy every bite!

Top Tip

Mastering Slow Cooker French Dip Sandwiches with Au Jus Recipe is all about layering flavors and textures to elevate this comforting classic. Here are some tips I've gathered that make this recipe shine every time.

Sear for Depth: Taking the time to sear your beef chuck roast well before slow cooking creates a delicious crust that deepens the flavor of both the meat and the au jus. It’s absolutely worth the couple extra minutes.
Keep the Au Jus Warm: I learned that serving the jus warm on the side makes all the difference in recreating that dipping experience that’s signature to French dips. Don’t skip this step!
Slice Thinly: Slicing the roast beef into ¼-inch thick pieces helps keep the meat tender and easy to bite into, which improves the sandwich's overall mouthfeel.
Customize Horseradish Mayo: Adjust the horseradish quantity in your mayo to suit your spice preference. I once added too much and it overwhelmed the rest of the flavors — a little goes a long way!

How to Serve Slow Cooker French Dip Sandwiches with Au Jus Recipe

A large piece of cooked dark brown meat sits in the center of a black round pot, surrounded by a thick layer of white onion slices that fill the pot's bottom and sides. The pot has a handle with a rectangular opening on the left side. The scene is set on a wooden table with a sprig of fresh green herbs near the top of the pot. To the left, there is a white tray holding light brown dinner rolls, and a small wooden bowl of coarse white salt. A glass of dark brown liquid sits near the top right corner of the pot on the table. A beige and purple striped cloth lies partially under the pot at the bottom of the image. The background is changed to a white marbled texture. photo taken with an iphone --ar 2:3 --v 7

Garnishes

To add a fresh, vibrant touch to your sandwiches, consider garnishing with thinly sliced fresh parsley or a sprinkle of freshly cracked black pepper. A few dill pickle slices on the side also complement the savory flavors nicely and add a pleasant crunch.

Side Dishes

Classic French fries or crispy potato chips pair wonderfully for that traditional deli vibe. For a lighter side, a simple mixed green salad with a tangy vinaigrette balances the richness. Roasted vegetables or creamy coleslaw can also round out your meal beautifully.

Make Ahead and Storage

Storing Leftovers

Store any leftover roast beef, onions, and au jus together in an airtight container in the refrigerator. They’ll keep well for up to 3 days, giving you quick, flavorful meals later in the week.

Freezing

For longer storage, freeze the beef and broth mixture in a freezer-safe container or bag. Properly stored, it will maintain its quality for up to 2 months. Label with the date so you can keep track.

Reheating

Reheat the beef and au jus gently on the stovetop over low heat until warmed through, adding extra broth or water if it looks dry. Re-toast the rolls before assembling sandwiches again to keep them crispy and fresh.

Frequently Asked Questions:

Can I use a different cut of beef for this recipe?

While beef chuck roast is ideal for slow cooking due to its marbling and tenderness, you can use other cuts like brisket or round roast. Just ensure the cut you choose becomes tender with slow cooking.

How do I make the au jus thicker?

If you prefer a thicker jus, whisk in a slurry of cornstarch and cold water to the strained broth and simmer it gently until it thickens. Be careful not to over-thicken since it’s meant to be a dipping sauce.

Can I prepare this recipe in advance?

Absolutely! You can slow cook the roast up to a day ahead, keep everything refrigerated, and then assemble and broil the sandwiches just before serving for the best texture.

What can I use if I don’t have provolone cheese?

Swiss or mozzarella cheeses make great substitutes that melt well and complement the flavors of the sandwich, so feel free to swap according to what you have available.

Final Thoughts

This Slow Cooker French Dip Sandwiches with Au Jus Recipe is one of those dishes that feels special yet requires minimal fuss. It’s the perfect recipe to cozy up with on a weekend or impress guests with a hearty, flavorful meal. The tender beef, complemented by melted provolone and a zesty horseradish mayo, all dipped into that rich au jus? Truly comfort food at its finest. I hope you enjoy making it as much as I do sharing it. Happy cooking!