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Slow Cooker French Dip Sandwiches with Au Jus

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A three to four pound beef chuck roast — seared until deeply browned on all sides, the skillet deglazed with beef broth and the fond scraped into the slow cooker — braised for 8 hours on LOW in a combination of beef broth, Worcestershire, soy sauce, Dijon, halved onion, smashed garlic, fresh thyme, and bay leaves. The beef emerges falling-apart tender and deeply seasoned. The braising liquid, strained, skimmed, and seasoned, is the au jus — dark, silky, gelatin-rich, deeply beefy, and entirely produced from the meat itself over eight hours. The beef shredded and piled onto toasted hoagie rolls with provolone, the au jus served warm in individual cups alongside. The French dip made right.

  • Total Time: 8 hours 50 minutes
  • Yield: 6–8 sandwiches 1x

Ingredients

Scale

The Beef

  • 3–4 lbs (1.4–1.8kg) beef chuck roast or sirloin tip roast
  • 2 tbsp neutral oil
  • 1½ tsp salt
  • 1 tsp black pepper

The Braising Liquid

  • 2 cups (480ml) beef broth
  • 2 tbsp Worcestershire sauce
  • 1 tbsp soy sauce
  • 1 tsp Dijon mustard
  • 1 tsp beef Better Than Bouillon paste (optional)

The Aromatics

  • 1 large yellow onion, halved
  • 4–5 garlic cloves, smashed
  • 4 sprigs fresh thyme
  • 2 bay leaves

For the Sandwiches

 

  • 6–8 hoagie rolls or French rolls, split
  • 6–8 slices provolone or Gruyère (optional)
  • Caramelized onions (optional)
  • Prepared horseradish for serving

Instructions

  • Season and sear the beef. Pat the roast completely dry with paper towels. Season generously on all sides with salt and black pepper. Heat the oil in a large heavy-bottomed skillet over medium-high heat until shimmering. Sear the roast on all sides — 2 to 3 minutes per side — until deeply browned all over. Do not rush. Transfer to the slow cooker.
  • Deglaze the skillet. Pour a splash of the beef broth (about a quarter cup) into the hot skillet. Scrape up every browned bit from the bottom with a wooden spoon. Pour the entire contents of the skillet into the slow cooker.
  • Build the braise. Add the onion halves cut-side down, the smashed garlic, thyme sprigs, and bay leaves to the slow cooker. Pour in the remaining beef broth. Add the Worcestershire sauce, soy sauce, Dijon mustard, and Better Than Bouillon paste if using. The liquid should reach approximately halfway up the sides of the roast.
  • Cook. Set the slow cooker to LOW and cook for 8 hours, until the beef is completely tender and falls apart when prodded with a fork. Do not open the lid during cooking.
  • Rest and prepare the beef. Transfer the beef to a cutting board. For chuck roast: shred into generous pieces using two forks. For sirloin tip: rest for 15 minutes, then slice thinly against the grain with a sharp carving knife.
  • Make the au jus. Pour the braising liquid through a fine mesh strainer into a large measuring jug or saucepan, pressing the solids to extract every drop. Discard the solids. Skim the fat from the surface using a fat separator, ladle, or by refrigerating briefly until the fat solidifies. Taste and adjust seasoning with salt, a splash of Worcestershire, or a small amount of soy sauce. Keep warm in the slow cooker on KEEP WARM or in a small saucepan over very low heat.
  • Toast the rolls. Place the rolls cut-side up on a baking sheet. Broil for 2 to 3 minutes until the cut surfaces are golden and slightly crisp. Watch carefully.
  • Assemble and serve. Pile the beef generously onto the toasted rolls. Add a slice of provolone or Gruyère and a spoonful of caramelized onions if using. Return the sandwiches to the broiler for 1 to 2 minutes until the cheese is melted. Ladle the hot au jus into individual small cups or ramekins — one per sandwich. Serve immediately with prepared horseradish alongside.

Notes

  • Sear — it is not optional for au jus quality. The Maillard reaction on the beef surface and the deglazed fond from the skillet are the primary sources of the au jus’s color and depth. An unseared roast produces a pale, thinner au jus. The ten minutes of searing directly determine the quality of the dipping experience.
  • Chuck roast is the best cut. Its high collagen and marbling content produce the richest, most gelatin-enriched au jus and the most yielding, most deeply flavored beef. It shreds into generous pieces that absorb the au jus and stay moist. Sirloin tip produces a cleaner slice but a less rich broth.
  • The liquid level matters. Halfway up the sides of the roast is the target — enough for a steamy, moist braising environment without submerging the beef. Too much liquid produces beef that cooks in its liquid rather than braising above it, and a more diluted au jus.
  • The au jus thickens to a gel when cold — this is perfect. Gelatin-enriched broth solidifies to a soft gel at refrigerator temperature. This is the sign of a properly made, collagen-rich au jus. Reheat gently and it returns to liquid. A gel in the jar means the au jus was made correctly.
  • Skim the fat thoroughly. The fat layer on the surface of the au jus is the primary source of a greasy dipping experience. Skim it off with a ladle, use a fat separator, or refrigerate and lift the solidified fat cap. A small amount of fat is correct and enriches the au jus. A thick layer of rendered fat is not.
  • Toast the rolls every time. An untoasted roll cannot survive the French dip experience. The cut surface of the roll, toasted until golden, creates the moisture barrier that allows the sandwich to be picked up, dipped, and eaten without disintegration. This single step is the difference between a structurally sound French dip and a sandwich that dissolves on the way to the mouth.
  • Pile the beef generously. The beef compresses when the sandwich is pressed together and absorbs moisture from the au jus during dipping. Start with more beef than looks right. The correct French dip is heavy.
  • Author: Elle
  • Prep Time: 20 minutes
  • Cook Time: 8 hours (on LOW)
  • Category: Dinner, Main Dish
  • Method: Slow Cooking
  • Cuisine: American
  • Diet: Dairy-Free

Find it online: https://slowcookerrecipes.us/slow-cooker-french-dip-sandwiches-with-au-jus/