01 -
Divide ground beef into 4 equal portions and shape each into a ball.
02 -
Heat a cast-iron skillet or griddle over high heat until extremely hot.
03 -
Place beef balls on the hot surface. Season with kosher salt, black pepper, 1 teaspoon Smashburger sauce, and a portion of sliced onions.
04 -
Cover each portion with parchment paper and use a spatula to press firmly, forming thin patties.
05 -
Cook patties until the bottom is well-browned and caramelized. Flip each patty.
06 -
Top each patty with 2 slices of American cheese, allowing it to melt as the beef cooks through.
07 -
Lower heat to low. Spread 1 tablespoon Smashburger sauce on 4 slices of bread.
08 -
Melt 1 tablespoon of butter over a clean section of the skillet. Place the sauced slices bread-side down onto the skillet.
09 -
Set each cheeseburger patty on a slice of bread, cheese side down. Top with dill pickle chips and distribute shredded Havarti cheese evenly among the sandwiches.
10 -
Place remaining bread slices over the top. Spread the remaining butter on the tops of the sandwiches.
11 -
Cook until the bottoms are golden brown and the Havarti cheese starts melting. Carefully flip and grill the other sides until golden and cheese is completely melted.
12 -
Remove from heat and let sandwiches rest for 1 minute before serving. Present warm with additional Smashburger sauce for dipping.