Step 1: Make the Special Sauce

1. In a small bowl, whisk together mayonnaise, ketchup, mustard, pickle relish, garlic powder, smoked paprika, and Worcestershire sauce until well combined.
2. Cover and refrigerate while preparing the burgers.

Step 2: Shape the Burger Patties

1. Divide the ground beef into four equal portions (about 4 oz each).
2. Roll each portion into a loose ball—don’t pack them too tightly, as this helps create a better smash burger texture.
3. Season lightly with salt, pepper, and garlic powder on top.

Step 3: Toast the Buns

1. Heat a skillet or griddle over medium heat.
2. Spread butter on the cut sides of the brioche buns and toast them for about 1-2 minutes, until golden brown. Remove and set aside.

Step 4: Smash and Cook the Burgers

1. Heat a cast-iron skillet or griddle over high heat until smoking hot.
2. Place one beef ball onto the hot surface and immediately press down firmly with a spatula or burger press. Flatten it until it’s about ¼-inch thick. Repeat with the other patties.
3. Let the patties cook undisturbed for 1-2 minutes until the edges are crispy and caramelized.
4. Flip the patties and immediately place a slice of cheese on top of each one. Cook for another 30 seconds to 1 minute until the cheese melts.

Step 5: Assemble the Burgers

1. Spread a generous layer of special sauce on the bottom half of each bun.
2. Place one cheesy patty on the bun, followed by a second cheesy patty.
3. Add pickles, lettuce, and tomato if using.
4. Spread a little extra sauce on the top bun and place it over the stack.

Step 6: Serve & Enjoy

1. Serve hot with crispy fries, onion rings, or a side of coleslaw.
2. Take a big bite and enjoy the perfect Smash Double Cheese Burger experience!