Name: Copycat In-N-Out Double Double Burger Recipe
Yield: makes 4 burgers
Ingredients: 1/3 cup mayonnaise; 2 tablespoons ketchup; 2 tablespoons sweet relish; 1 teaspoon sugar; 1 teaspoon white vinegar; dash Worcestershire sauce; salt and freshly ground pepper, to taste; 4 hamburger burgers, butter for buns, if desired; 1 lb ground beef chuck, preferably not lean; salt and freshly ground pepper; oil for the pan; 4 thick slices beefsteak tomatoes; 4 leaves iceberg lettuce, torn into bun size pieces; 8 slices American cheese; 4 thin slices large onion, kept intact