Mushroom Swiss Burger with Onions (Printer-friendly)
Juicy beef patty with sautéed mushrooms, Swiss cheese, and sweet caramelized onions on a toasted bun.
# What You'll Need:
→ Caramelized Onions
01 - 2 large yellow onions, thinly sliced
02 - 2 tablespoons unsalted butter
03 - 1 tablespoon olive oil
04 - 1/2 teaspoon salt
05 - 1 teaspoon balsamic vinegar
→ Sautéed Mushrooms
06 - 9 ounces cremini or button mushrooms, sliced
07 - 1 tablespoon unsalted butter
08 - 1 tablespoon olive oil
09 - 1 clove garlic, minced
10 - 1/4 teaspoon salt
11 - 1/4 teaspoon black pepper
12 - 1 teaspoon fresh thyme leaves
→ Burgers
13 - 1.3 pounds ground beef (80% lean)
14 - 1/2 teaspoon salt
15 - 1/2 teaspoon black pepper
16 - 4 slices Swiss cheese
17 - 4 burger buns, split and toasted
18 - 2 tablespoons mayonnaise
19 - 1 tablespoon Dijon mustard
20 - Lettuce leaves
# Directions:
01 - In a large skillet over medium heat, melt butter with olive oil. Add sliced onions and salt. Cook, stirring occasionally, until onions are deeply golden and caramelized, about 18–20 minutes. Add balsamic vinegar in the last minute. Remove from skillet and set aside.
02 - In the same skillet, melt butter with olive oil over medium-high heat. Add mushrooms and cook, stirring occasionally, until browned and their moisture has evaporated, about 6–8 minutes. Stir in garlic, salt, pepper, and thyme. Sauté for another 1–2 minutes. Remove from heat.
03 - Divide ground beef into 4 equal portions and gently shape into patties slightly larger than your buns. Season both sides with salt and pepper.
04 - Heat a grill, grill pan, or skillet over medium-high heat. Cook patties for 3–4 minutes per side for medium doneness, or until desired doneness. In the last minute, place a slice of Swiss cheese on each patty, cover, and let melt.
05 - Spread mayonnaise and mustard on the cut sides of toasted buns if desired. Place lettuce on the bottom bun, add the burger patty with melted Swiss cheese, top with sautéed mushrooms and caramelized onions. Finish with the top bun.
06 - Serve immediately with your favorite side dish.
# Expert Advice:
01 -
- The combination of sweet caramelized onions and earthy mushrooms creates layers of flavor that make every bite unforgettable
- Melting Swiss cheese over the hot patty brings everything together into that perfect gooey bite we all chase after
02 -
- Caramelizing onions cannot be rushed, trying to turn up the heat will only burn them and make them bitter instead of sweet
- Let your burgers rest for just a minute after cooking so the juices redistribute instead of running out the first time you bite into them
03 -
- Make extra caramelized onions and keep them in the fridge, they elevate everything from pizzas to grilled cheese sandwiches
- Don't press down on your burgers while they cook, you'll lose all those precious juices that make them perfectly tender