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From The Tender, Juicy Meat To The Rich, Savory Au Jus Sauce, This Slow Cooker French Dip Recipe Is Perfection

If there is one sandwich that is very popular in my house, it is a good roast beef with au jus sauce. Getting a great, authentic au jus sauce is hard, however. Sure, we could use a powdered gravy, but it just doesn’t taste the same. I wanted to find a recipe that would provide a great au jus sauce as well as a fantastic roast beef just waiting to be thinly sliced and added to a sandwich.

It turns out, this great roast beef as well as the au jus can be made easily in the crock pot. That beef flavor was important, so of course cooking the roast in the crock pot was necessary. From there, we added a combination of soy sauce and Worcestershire sauce to get that classic flavor. To add a little more strength to the au jus, we cooked with whole peppercorns, a bay leaf, and used a little more beef broth in the base. Keep reading below for this fantastic recipe…

Slow Cooker Sandwich: French Dip Roast Beef

French Dip Roast Beef Sandwich

(makes 8 servings)


  • 1 medium yellow onion
  • 2 cups beef broth
  • 1/4 cup soy sauce
  • 1 tablespoon Worcestershire sauce
  • 1 tablespoon dijon mustard
  • 3 cloves garlic, minced
  • 3-4 peppercorns
  • 1 bay leaf
  • 1 teaspoon dried thyme
  • salt to taste
  • 3lb boneless beef bottom roast


  1. Slice the onion into 1/4″ rings and layer the bottom of the crock pot.
  2. Trim the roast of visible fat, then salt both sides of the roast. Place on top of the onions.
  3. Add the remaining ingredients to the slow cooker, pouring the broth and soy sauce over the beef. If the roast isn’t covered, add enough water to almost cover the meat in liquid.
  4. Cover and cook on high for 4-6 hours or low 10-12 hours. Remove the meat from the liquid. Let stand 5 minutes before slicing thinly across the grain.
  5. Serve the meat in a sandwich with a small cup of the au jus to the side.
  6. Enjoy!


Recipe adapted fromPrevention RD

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