Savory Mushroom Swiss Burger (Print version)

Juicy beef patties topped with buttery browned mushrooms and melted Swiss cheese on toasted buns.

# Ingredients:

For the mushroom topping

01 - 1 tablespoon unsalted butter

02 - 1 tablespoon olive oil

03 - 12 oz (340 g) cremini mushrooms, sliced

04 - 1/2 small yellow onion, finely chopped

05 - 2 cloves garlic, minced

06 - 1 tablespoon Worcestershire sauce

07 - 1/4 cup (60 ml) beef broth

08 - 1/2 teaspoon dried thyme

09 - 1/4 teaspoon black pepper

10 - Salt, to taste

For the burgers

11 - 1 1/2 lb (680 g) 80/20 ground beef

12 - 1 tablespoon Worcestershire sauce

13 - 1 teaspoon kosher salt

14 - 1/2 teaspoon black pepper

15 - 4 slices Swiss cheese

16 - 4 brioche or potato burger buns, split

17 - 2 tablespoons mayonnaise

18 - 1 teaspoon Dijon mustard

19 - 4 lettuce leaves, optional

# Instructions:

01 - Heat butter and olive oil in a wide skillet over medium-high heat. Add mushrooms and cook for 5-6 minutes without stirring much, until their liquid releases and starts to cook off.

02 - Add onion and cook for 2 minutes. Stir in garlic, Worcestershire sauce, beef broth, thyme, pepper, and a pinch of salt. Simmer for 3-5 minutes until glossy and nearly dry, then set aside.

03 - Gently mix ground beef with Worcestershire sauce, salt, and pepper. Form 4 patties slightly wider than the buns and press a shallow dimple in the center of each.

04 - Heat a grill or cast iron skillet over medium-high heat. Cook patties for 3-4 minutes per side, or until the center reaches 160°F for ground beef.

05 - Place a slice of Swiss cheese on each patty during the last minute of cooking. Cover the pan or close the grill lid until the cheese melts.

06 - Toast the cut sides of the buns. Mix mayonnaise with Dijon mustard, spread on the buns, then layer lettuce if using, the cheesy patties, and warm mushroom topping. Serve right away.

# Good to know:

01 - Cook mushrooms until the pan is nearly dry before topping the burger.

02 - Ground beef should reach 160°F for food safety.

03 - Best served immediately after assembly.

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