All the info is in the picture. Order for pick up using the Shake Shack app or online – a single Shack Burger, add pickle, add cherry peppers, and sliced onions and you order will be FREE.
Source ikillu4coupons on IG
Also, a reader, Growly let us know the following about Shake Shack:
New offer: BOGO burger or chicken sandwich with code THANKYOU, until 1/3/21.