Ingredients
Scale
- 2 tablespoons olive oil
- 2 large yellow onions, thinly sliced
- 1 teaspoon sugar
- 1 pound ground beef
- 1 teaspoon salt
- 1/2 teaspoon black pepper
- 1 tablespoon all-purpose flour
- 1 cup beef broth
- 1/4 cup Worcestershire sauce
- 1 tablespoon Dijon mustard
- 6 brioche buns, split
- 6 slices Gruyère cheese
Instructions
- Heat olive oil in a large skillet over medium heat. Add sliced onions and sugar, and cook, stirring occasionally, until onions are deeply caramelized and golden brown, about 20-25 minutes. Reduce heat if necessary to prevent burning.
- Add ground beef to the skillet with the caramelized onions. Season with salt and pepper. Cook, breaking up the beef with a spoon, until browned, about 5-7 minutes. Drain off any excess grease.
- Sprinkle flour over the beef and onions, and stir to coat. Cook for 1 minute.
- Gradually pour in beef broth, stirring constantly to prevent lumps. Add Worcestershire sauce and Dijon mustard. Bring to a simmer, then reduce heat and cook for 10-15 minutes, or until the sauce has thickened slightly.
- While the beef mixture is simmering, lightly toast the brioche buns.
- Spoon the French onion beef mixture onto the bottom buns. Top with a slice of Gruyère cheese. Place the top buns over the cheese. Serve immediately.
Notes
For an extra layer of flavor, try adding a splash of balsamic vinegar to the onions while they are caramelizing. You can also use other types of cheese like provolone or Swiss. These are best served immediately but can be stored in the refrigerator for up to 3 days.
- Prep Time: 20 minutes
- Cook Time: 30 minutes
- Category: Main Course
- Method: Stovetop
- Cuisine: American
Nutrition
- Serving Size: 1 sloppy joe
- Calories: 450
- Sugar: 10g
- Sodium: 750mg
- Fat: 25g
- Saturated Fat: 12g
- Unsaturated Fat: 10g
- Trans Fat: 0.5g
- Carbohydrates: 35g
- Fiber: 3g
- Protein: 25g
- Cholesterol: 90mg