Ingredients
2 large yellow onions, thinly sliced
2 tbsp butter
1 tbsp olive oil
½ cup beef broth
1 tbsp Worcestershire sauce
1½ lbs ground beef (80/20)
1 tsp garlic powder
½ tsp black pepper
½ tsp dried thyme
4 brioche buns, toasted
4 slices provolone or Swiss cheese
Instructions
1. In a large skillet, melt butter with olive oil over medium-low heat. Add onions and a pinch of salt.
2. Cook onions slowly, stirring often, until golden and caramelized (about 25–30 minutes).
3. Add beef broth and Worcestershire sauce to onions. Simmer until reduced.
4. In a separate skillet, brown the ground beef. Season with garlic powder, black pepper, and thyme.
5. Combine the beef with the onion mixture. Let it simmer 5–10 minutes until thick and saucy.
6. Toast brioche buns. Spoon beef mixture onto each bun.
7. Top with cheese slices and broil for 1–2 minutes until melted. Serve immediately.
Notes
You can substitute Swiss with Gruyère or provolone.
For a low-carb option, serve on cloud bread.
Leftovers freeze well for up to 2 months.
- Prep Time: 10 mins
- Cook Time: 30 mins
- Category: Dinner
- Method: Stovetop + Broiler
- Cuisine: American
Nutrition
- Serving Size: 1 sandwich
- Calories: 525
- Sugar: 6g
- Sodium: 780mg
- Fat: 32g
- Saturated Fat: 14g
- Unsaturated Fat: 15g
- Trans Fat: 0g
- Carbohydrates: 32g
- Fiber: 2g
- Protein: 29g
- Cholesterol: 95mg