Finish this year or start off the next with this great buy one get one offer from Shake Shack!
Now through January 2nd, 2022, you can get a second Shack Burger for free when you order using the Shake Shack app or website with the promo code THANKYOU21.
ShackBurger’s are the restaurant’s signature sandwich, made with a pure beef patty, topped with cheese, lettuce, tomato, and secret ShackSauce, served on a toasted potato bun.