Step 1: Preheat a cast iron skillet or flat-top griddle over medium-high heat until it is smoking hot. The extreme heat is key to a successful smash burger recipe.
Step 2: Divide the ground beef into 4 equal, loose balls. Do not pack them tightly, as this will hinder the 'smash' effect.
Step 3: Lightly oil the hot cooking surface. Place the beef balls onto the griddle, ensuring there's enough space between them.
Step 4: Immediately place a piece of parchment paper over each beef ball. Using a sturdy, flat spatula or burger press, firmly press down on each ball for about 10-15 seconds, smashing it into a thin, approximately 1/4-inch thick patty. Maximize contact with the hot surface.
Step 5: Remove the parchment paper. Season the smashed patties generously with salt and freshly ground black pepper. Cook undisturbed for 2-3 minutes, until the edges are crispy and browned, and a crust has formed. This is vital for a great smash burger recipe.
Step 6: Scrape the patties off the griddle with the spatula, ensuring you get all the delicious crispy bits, and flip them. Immediately place a slice of cheese on top of each patty.
Step 7: While the cheese melts (about 1 minute), lightly butter the cut sides of your burger buns and place them face down on the griddle to toast until golden brown.
Step 8: Once the cheese is melted and the buns are toasted, remove them from the griddle. Stack two cheesy patties onto the bottom bun for a classic double smash burger.
Step 9: Add your favorite toppings and condiments to complete your ultimate smash burger recipe masterpiece. Place the top bun and serve immediately for the best experience!