Shake Shack's ShackBurger is a classic cheeseburger with a twist. The patty is made from a blend of Angus beef and served on a potato bun with lettuce, tomato, and ShackSauce. The ShackSauce is a secret recipe that includes mayonnaise, ketchup, mustard, and spices. The result is a juicy, flavorful burger that has become a fan favorite.
