Melt 2 tablespoons of butter in a large skillet over medium heat. Add sliced onions and cook, stirring frequently, until caramelized.
Sprinkle 1 teaspoon of Omaha Steaks Seasoning evenly onto each ribeye burger.
Heat a large cast-iron skillet over medium-high heat. Place the burgers in the skillet and cook for 3-5 minutes.
Flip burgers and top each patty with 2 slices of American cheese. Cook for about 3 minutes while cheese melts.
Heat 1 tablespoon of butter in a separate pan over medium-high heat. Place burger buns cut side-down and toast until nice and golden.
Assembly: Spread special sauce across toasted bun bottoms. Top bottom buns with cheeseburger patties, then layer on caramelized onions, pickle coins, tomato slices, and a piece of lettuce. Spread more special sauce across toasted top bun place on top of each finished burger.