01 - Set a large skillet or griddle over medium-high heat. Add 1 tbsp unsalted butter and allow it to fully melt across the cooking surface.
02 - Add the ground beef to the skillet and spread it out evenly. Press down firmly with a spatula to create a thin smash burger crust. Let it cook undisturbed for 2 to 3 minutes until a deep brown sear forms, then break the meat apart into crumbles.
03 - Add the finely diced onion to the beef and cook for 3 to 4 minutes until softened and translucent. Stir in the minced garlic and cook for 1 additional minute until fragrant.
04 - Add the chopped dill pickles, ketchup, yellow mustard, Worcestershire sauce, brown sugar, smoked paprika, black pepper, and salt. Stir thoroughly to combine and let the mixture simmer for 5 to 7 minutes until it thickens into a rich, saucy consistency.
05 - While the meat mixture simmers, butter the cut sides of the hamburger buns and toast them on a separate pan or griddle until golden brown and crisp.
06 - Lay the cheese slices directly over the hot beef mixture and allow them to melt slightly from the residual heat, then remove the skillet from the burner.
07 - Spoon the cheesy beef mixture generously onto the bottom half of each toasted bun. Top with sliced tomato and shredded lettuce if desired, then cap with the top bun. Serve immediately while hot.