Mushroom Swiss Burgers with Caramelized Onions Recipe
These Mushroom Swiss Burgers with Caramelized Onions feature juicy grilled beef patties topped with savory caramelized onions, perfectly browned Bella mushrooms, and melted baby Swiss cheese, all served on soft hamburger buns. This flavorful burger recipe balances smoky grilled beef with sweet onions and earthy mushrooms for an irresistible meal.
- Prep Time: 10 minutes
- Cook Time: 32 minutes
- Total Time: 42 minutes
- Yield: 4 servings
- Category: Main Course
- Method: Grilling
- Cuisine: American
Ingredients
For the Burgers
- 1 ½ pounds 85% ground beef
- Kosher salt, to taste
- Freshly ground black pepper, to taste
- ½ teaspoon onion powder
- ½ teaspoon garlic powder
- 4 slices baby Swiss cheese
- Hamburger buns, to serve
For the Caramelized Onions
- 2 tablespoons unsalted butter
- 1 large yellow onion, sliced
- Salt, to taste
- Black pepper, to taste
For the Mushrooms
- 1–2 tablespoons olive oil
- 8 oz. sliced Bella mushrooms
- Salt, to taste
- Black pepper, to taste
Instructions
- Caramelize onions: Melt 2 tablespoons of unsalted butter in a medium cast iron skillet over medium heat. Add the sliced onion along with salt and pepper. Cook, stirring frequently and adding splashes of water as needed to prevent burning, until the onions turn golden brown and caramelized, about 30 minutes (longer if cooking a larger quantity).
- Brown mushrooms: In the same skillet or a separate one, heat 1 to 2 tablespoons of olive oil over medium-high heat. Add the sliced Bella mushrooms and cook until browned and tender, approximately 10 minutes. Season with salt and pepper to taste.
- Prepare burger patties: Divide the ground beef into four equal portions and form each into a patty, making a slight indentation in the center to prevent puffing during cooking. Season both sides with kosher salt, freshly ground black pepper, onion powder, and garlic powder.
- Preheat grill: Light an outdoor grill to medium-high heat. Add wood chips if desired to infuse a smoky flavor.
- Grill burgers: Place the patties on the grill grates and cook until they reach your preferred doneness, flipping once halfway through. Add a slice of baby Swiss cheese on top of each patty during the last moments of grilling to melt.
- Assemble burgers: Place each grilled burger on a hamburger bun. Top with caramelized onions and browned mushrooms. Serve immediately and enjoy the flavorful, juicy mess!
Notes
- Caramelizing onions may take longer if making a larger batch; be patient for best flavor.
- To keep the mushrooms from overcrowding, cook them in batches if necessary to ensure proper browning.
- Make a slight indentation in each burger patty’s center to ensure even cooking and prevent puffing.
- Use wood chips on the grill for a smoky flavor enhancement, but this is optional.
- Adjust seasoning to your preference throughout the recipe.
