Ingredients
See All Nutritional Information
1 large yellow onion, thinly sliced
5 Tbsp. unsalted butter, divided
Kosher salt
2 Tbsp. store-bought French dressing
2 Tbsp. store-bought Thousand Island dressing
1/4 tsp. Worcestershire sauce
4 slices sourdough bread
1 lb. (80% lean) ground beef
2 slices American cheese
2 slices Swiss cheese
Directions
Step 1
In a medium saucepan over medium-low heat, combine onions and 3 tablespoons water. Cover and cook 10 minutes. Uncover, reduce heat to low, and continue to cook, stirring frequently, until onions start to slightly brown on bottom of pan, about 5 minutes. Add 1 tablespoon water and continue to cook, stirring frequently, until onions are reduced in size and are a deep golden brown, about 15 minutes more. Remove from heat, then stir in 1 tablespoon butter; season with salt.
Step 2
In a small bowl, mix French dressing, Thousand Island dressing, and Worcestershire sauce until combined. In a large skillet over medium-low heat, melt 2 tablespoons butter. Add 2 slices of bread, let bread absorb butter, and toast on one side until golden brown, about 2 minutes. Transfer to a plate. Repeat with remaining 2 tablespoons butter and 2 slices bread.
Step 3
Spread sauce on 1 side of 2 slices bread. Arrange caramelized onions on remaining 2 slices.
Step 4
Form beef into 4 (4-oz.) balls. Heat same skillet over medium-high heat until very hot. Add meat and smash with the back of a spatula until a thin patty forms; season with salt. Cook until just browned, about 1 minute. Flip and continue to cook until second side is browned, about 1 minute. Flip again and cook until edges are crispy and browned, about 1 minute more.
Step 5
Arrange 1 slice American cheese and 1 slice Swiss cheese on 2 patties. Carefully place 2 patties on top of cheese. Cover and cook until cheese is melty, about 1 minute.
Step 6
Place a burger on top of onions. Close sandwiches sauce side down.
Step 7
In same skillet over medium heat, cook sandwiches, turning once, until bread is toasted and sandwiches are warmed through, about 1 minute per side.
0 Comments