Shake Shack's BLT features applewood-smoked bacon, lettuce, tomato, and ShackSauce on a toasted potato bun — no beef patty. It's a lighter, non-burger option that floats between the official menu and secret menu depending on the location. One of the few fast food BLTs available at a major chain, it's a solid choice for anyone who wants Shake Shack's quality bun and sauce without the burger.