Shake Shack: Buy One Get One FREE Burger

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Get a Buy One Get One FREE Burger at Shake Shack!

Shake Shack burgers are custom 100% Angus beef blend, never frozen, no hormones or antibiotics ever, humanely raised and grazed in the USA.

Right now, Shake Shake is offering Buy One Get One Free Burger! Online or via their App (Android or iOS) when you use promo code THANKYOU21.

Offer valid for purchases made 12/26/2021 through 1/2/2022 on the Shack App or at for pick up or delivery at participating Shake Shack locations. One time use per account. Must add at least two (2) single ShackBurgers to cart prior to checkout. Offer excludes paid add-ons such as bacon, avocado, shallots, cherry peppers and gluten free bun.聽

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