krystal's signature product since 1932. the famous krystal, which is small in size but not in flavor, contains a thin, 100% usda all-beef burger patty grilled to perfection and made more appetizing by krystals traditional toppings: diced onions, tasty mustard and a juicy dill pickle - all on a square, steamy bun. or in short - simple, small, square, delicious.