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Irresistible French Onion Beef Sloppy Joes with caramelized onions ground beef Swiss cheese and crusty hamburger buns drizzled with Worcestershire and soy sauce

Irresistible French Onion Beef Sloppy Joes

Ground beef simmered with deeply caramelized onions in a savory tomato based sauce, topped with melted cheese on a toasted bun. A rich twist on the classic sloppy joe.
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Prep Time 10 minutes
Cook Time 45 minutes
Total Time 55 minutes
Servings: 6 servings
Course: Dinner
Cuisine: American
Calories: 480
Ingredients Equipment Method Notes

Ingredients
  

  • 1 1/2 lbs ground beef
  • 2 large yellow onions, thinly sliced
  • 2 tbsp butter
  • 1 tbsp olive oil
  • 2 cloves garlic, minced
  • 1 cup beef broth
  • 1/2 cup ketchup
  • 1 tbsp Worcestershire sauce
  • 1 tsp Dijon mustard
  • 1/2 tsp dried thyme
  • 1/2 tsp salt, plus more to taste
  • 1/4 tsp black pepper
  • 6 slices provolone or Swiss cheese
  • 6 whole sandwich buns, toasted

Equipment

  • Large skillet
  • Broiler or Oven

Method
 

  1. Caramelize onions in butter and olive oil over medium-low heat for 25 to 30 minutes.
  2. Add garlic, then brown ground beef in the same skillet.
  3. Drain excess grease and stir onions back into the beef.
  4. Add broth, ketchup, Worcestershire, mustard, and seasoning, then simmer until thickened.
  5. Top toasted buns with the beef mixture and cheese, then melt cheese before serving.

Notes

  • Caramelize onions slowly over medium-low heat for best flavor.
  • Toast buns to prevent them from getting soggy.
  • Simmer filling until thickened before serving.
  • Freezes well for up to 3 months.