Mushroom Swiss Burger Onions (Print Version)
Juicy beef patty stacked with sautéed mushrooms, Swiss cheese, and sweet caramelized onions on brioche buns.
# Recipe Ingredients:
→ For the Burgers
01 - 1 ½ lbs ground beef, 80/20 blend recommended
02 - 1 tsp kosher salt
03 - ½ tsp black pepper
→ For the Caramelized Onions
04 - 2 large yellow onions, thinly sliced
05 - 2 tbsp unsalted butter
06 - 1 tsp sugar
07 - Pinch of salt
→ For the Sautéed Mushrooms
08 - 8 oz cremini or button mushrooms, sliced
09 - 1 tbsp olive oil
10 - ½ tsp fresh thyme leaves
11 - Salt and pepper, to taste
→ For Assembly
12 - 4 slices Swiss cheese
13 - 4 brioche burger buns
14 - 2 tbsp mayonnaise
15 - 1 cup arugula or lettuce leaves
# Directions:
01 - In a large skillet over medium heat, melt the butter. Add sliced onions, sugar, and a pinch of salt. Cook, stirring occasionally, for 15–20 minutes or until onions are golden brown and soft. Set aside.
02 - In another skillet, heat olive oil over medium-high heat. Add mushrooms and cook for 5–7 minutes until browned and tender. Season with salt, pepper, and thyme. Remove from heat.
03 - In a bowl, gently mix ground beef with salt and pepper. Form into 4 equal patties, pressing a small indentation in the center of each to prevent puffing during cooking.
04 - Heat a grill or skillet over medium-high heat. Cook the patties for 3–4 minutes per side for medium doneness. In the last minute of cooking, top each patty with a slice of Swiss cheese and cover to melt.
05 - Lightly toast brioche buns on the grill or in a toaster.
06 - Spread mayonnaise on the bottom buns. Add arugula or lettuce, then place the burger patties on top. Pile on the sautéed mushrooms and caramelized onions. Top with the upper buns and serve immediately.
# Expert Advice:
01 -
- The combination of earthy mushrooms and sweet onions makes every bite feel like a restaurant quality experience
- These burgers strike that perfect balance between nostalgic comfort food and something worth savoring slowly
02 -
- Caramelizing onions properly cannot be rushed, so plan ahead and let them develop that deep brown color slowly
- The indentation in the center of each patty is crucial because it prevents the burgers from puffing into balls while cooking
03 -
- Let the cooked burgers rest for a few minutes before assembling so the juices redistribute throughout the meat
- A splash of Worcestershire sauce in the mushrooms adds umami depth that people notice but cannot quite identify