Shake Shack is offering a FREE Shake Shack Burger with the purchase of any Burger (a $6 value!)!
Just head over and download the free Shake Shack app via iOS or android, place your order on the app and enter the promo code SHAKEITUP at checkout!
Here’s the deal:
Order 2 Shake Shack Burgers via the app priced around $5.59 each (may vary depending on your location)
Total = $11.18
Enter the promo code SHAKEITUP (coupon will deduct $6)
Final cost around $5.18 for both burgers – just $2.59 per burger!