Preheat your skillet over medium-high heat until it’s just starting to smoke, then add a tablespoon of oil to coat the surface evenly.
Divide the ground beef into four equal portions, gently shaping each into a loose ball without overworking the meat.
Place each beef ball onto the hot skillet, spacing them apart, and immediately press down firmly with a spatula to flatten into thin patties, about ¼-inch thick. You should hear a satisfying sizzle as the meat hits the pan.
Sprinkle salt and pepper generously over each patty right after smashing to enhance flavor and help form a savory crust.
Cook the patties for about 2-3 minutes until the edges are golden brown and crispy, and you hear that crackling sound of searing meat.
Use a spatula to flip each patty carefully, then immediately lay a slice of cheese on top of each, allowing it to melt as the patty cooks for another 1-2 minutes.
While the patties finish cooking, lightly toast the buns in a separate pan or toaster until golden and warm, releasing a warm, buttery aroma.
Assemble the burger by placing the cheesy patty on the bottom bun, then topping with sliced pickles, onions, and any other desired toppings.
Cap with the top bun, then serve immediately to enjoy the crispy edge, melty cheese, and flavorful toppings all together.