FREE Burger at Shake Shack Through Jan 2 2022

Are you are Shake Shack Burger fan? Starting today, Shake Shack customers can pop online or open the app to cash in on the deal. Order one ShackBurger online or in-app and add the promo code THANKYOU21 at checkout to get a second ShackBurger entirely for free. The ShackBurger is a classic burger featuring a single pure beef patty, cheese, lettuce, tomato, and ShackSauce on a toasted potato bun. This promo is good through January 2, so you can get one before your resolutions kick in or snag one to soothe that New Year’s Eve hangover.

free shake shack burger

This offer can be redeemed one time per account. To get your free burger, you need to order either through the Shack App or at

When you’re ready to checkout, make sure to enter code: THANKYOU21.

Some Rules: (from the T&Cs)

  • 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 (excluding airports, stadiums and ballparks)
  • One time use per account
  • Max savings of up to $6.39
  • Must add at least two single ShackBurgers to cart prior to checkout
  • Offer excludes paid add-ons such as bacon, avocado, shallots, cherry peppers and gluten free bun
  • Must be signed into an account for discount to apply
  • Use code ‘THANKYOU21’ at checkout

Shake Shack Giving Out Free Burgers

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