Eat and Drink ChickenShack sandwich coming to Brooklyn Shake Shacks Shake Shack will be selling the ChickenShack exclusively at Brooklyn Shacks starting on July 7, 2015. Photo Credit: Shake Shack By AMNY.COM July 7, 2015 9:54 AM Print Share Share Tweet Share Email Don't despair that National Fried Chicken Day is over, celebrate that Shake Shack will soon be bringing you a delicious chicken sandwich. That's right; Shake Shack announced on Tuesday that it will be selling the ChickenShack, an antibiotic-free chicken breast sandwich with pickles, lettuce and buttermilk-herb mayo. It goes on sale Tuesday and will only be on sale for a limited time. The ChickenShack will be sold exclusively at the three Brooklyn Shacks, located in downtown Brooklyn, DUMBO and Flatbush Ave. across from the Barclay's Center. By AMNY.COM Share on Facebook Share on Twitter Comments Comments section is temporarily on hold. Here’s why.