1Make the spread: In a bowl, combine mayonnaise, ketchup, vinegar, pickles, white onion, sugar, onion powder, garlic powder, salt, and pepper. Whisk until well combined. Add a splash of Worcestershire sauce.
2Toast the burger buns in a frying pan.
3Cook the burger patties in a frying pan, smashing them down to flatten.
4Assemble the burger: Spread sauce on the bottom bun. Add tomato, lettuce, a burger patty, cheese, onion, another patty, and cheese. Top with the other bun.