Shake Shack offers buy-one-get-one free Chicken Shack sandwich

Shake Shack is definitely known for its juicy burgers, but there is also a delicious option for chicken sandwich lovers on the menu. 

And, for a limited time, customers can scare up big savings on two Chicken Shack sandwiches at the popular restaurant. 

From Oct. 12 to 21, 2025, Shake Shack is offering a buy-one-get-one FREE Chicken Shack sandwich at participating locations — with promo code SPOOKY. (Be sure to use ALL CAPS, as that’s the only way the promo code will work.)

The offer is only valid for qualifying orders placed at a kiosk in-restaurant or for delivery or pick-up via the Shake Shack app or at shakeshack.com.

You must add at least two single Chicken Shack sandwiches to your cart prior to checkout. The discount excludes paid add-ons, including bacon, avocado and more.

Limit one FREE Chicken Shack sandwich per order.

Shack Shack has 352 locations in 33 states. 

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More food deals:

• Shake Shack offers buy-one-get-one free Chicken Shack sandwich
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This deal is from Living on the Cheap, our sister site.