Classic Cheeseburger with Secret Sauce

• 1 lb ground beef (80/20)
• 4 leaves iceberg lettuce
• 4 slices cheddar cheese
• 4 brioche buns, split
• 1/4 cup mayonnaise
• 2 tbsp ketchup
• 1 tbsp sweet pickle relish
• 1/2 tsp sugar
• 1/2 cup sliced onion
• 1 large tomato, sliced
• 8 dill pickle slices
• 1 tsp salt
• 1/2 tsp black pepper

Instructions

1. 1

   In a small bowl, whisk together the mayonnaise, ketchup, sweet pickle relish, and sugar until smooth to create the secret sauce. Set aside in the refrigerator.

2. 2

   Divide the ground beef into 4 equal portions. Gently form each portion into a patty about 3/4-inch thick and slightly wider than the buns. Create a shallow depression in the center of each patty to prevent puffing.

3. 3

   Generously season both sides of each patty with salt and black pepper.

4. 4

   Heat a large cast-iron skillet or grill over medium-high heat (about 375°F to 400°F / 190°C to 200°C).

5. 5

   Add the patties to the hot skillet. Cook without moving them for 3-4 minutes until a deep brown crust forms.

6. 6

   Flip the patties and cook for another 2-3 minutes. Determine doneness: 130°F (54°C) for medium-rare, 140°F (60°C) for medium. In the last minute of cooking, place a slice of cheddar cheese on each patty and cover the pan to melt the cheese.

7. 7

   While the burgers rest for a minute, lightly toast the cut sides of the brioche buns in the skillet or a toaster.

8. 8

   Assemble the burgers: spread secret sauce on the bottom bun, add lettuce, tomato slices, the cheeseburger patty, sliced onion, and dill pickles. Top with the other half of the bun and serve immediately.