A juicy all-American cheeseburger with melted cheese on a toasted bun is a high protein, family-favorite classic. This iconic dish is the cornerstone of every great backyard cookout.
Preheat a grill or large skillet over medium-high heat for at least 5 minutes.
Shape the ground beef into 4 equal patties about 3/4-inch thick and season both sides generously with kosher salt and black pepper.
Toast the burger buns, cut side down, on the grill or skillet with 1 tbsp butter until golden brown, about 1-2 minutes.
Cook the burger patties on medium-high heat for about 3-4 minutes per side, flipping once; top each patty with a slice of American cheese during the last minute and cover to melt.
Assemble the burgers: layer lettuce, tomato slice, and onion on bottom bun, add the hot cheeseburger patty, and finish with the top bun. Serve immediately for optimal juiciness.