Shake Shack is celebrating National Burger Month with a giveaway for burger lovers every week in May.
From May 1 to 31, 2026, Shake Shack is offering a different single burger every week for FREE with a $10 minimum purchase at participating locations. The offer excludes all paid add-ons, such as avocado or bacon.
Here’s which burger is available each week:
- May 11 to 17 – SmokeShack
- May 18 to 24 – Bacon Cheeseburger
- May 25 to 31 – ShackBurger
The offer is valid only for purchases placed at a kiosk in-restaurant or for delivery or pick-up via the Shake Shack app or at shakeshack.com. Use promo code FREEBURGER at checkout. (Note: Promo code must be entered in ALL CAPS.)…