Gently shape the ground beef into four slightly wider patties than your buns, pressing lightly to avoid overworking the meat for tender results.
Preheat your grill or cast-iron skillet over medium-high heat until hot, with a slight smoke or sizzle when the meat touches the surface.
Place the patties on the hot surface, hearing a satisfying sizzle. Cook for about 3-4 minutes, until the bottom develops a deep golden crust and releases easily from the pan.
Flip the patties using a spatula, and cook for another 3-4 minutes until the second side also has a rich, golden crust and the meat is nearly done.
Add a slice of cheese on top of each patty during the last minute of cooking. Cover the skillet or close the grill lid briefly to help the cheese melt into a bubbly, gooey layer.
While the patties finish, lightly toast the buns on the grill or in a toaster until golden and fragrant—about 1 to 2 minutes.
Spread ketchup and mustard on the toasted buns, then layer with crisp lettuce, fresh tomato slices, and pickles.
Place the cheesy patties on the bottom buns, then cap with the top buns. Gently press down to secure and let rest for 2 minutes, allowing the juices to settle.
Serve the burger hot, with the juices glistening and the cheese perfectly melted—ready to enjoy with your favorite sides.
