Smash Burgers

Bahan-bahan (4 porsi)

• ½ cup mayonnaise
• 3 tablespoons ketchup (or 4 tablespoons chili sauce)
• 2 teaspoons mustard
• 1 tablespoon grated dill pickles
• ½ teaspoon onion powder
• ½ teaspoon granulated sugar
• 1 ½ pounds lean ground beef (80/20)
• 1 teaspoon salt
• ½ teaspoon garlic powder
• ½ teaspoon black pepper
• 4 hamburger buns
• 2 tablespoons butter (softened)
• 4 slices cheddar cheese
• lettuce (tomatoes, pickles, onions as desired)