Shake Shack this week made its new chicken sandwich, which it has been testing, available across the United States. The “Chick’n Shack” sandwich is a fried chicken sandwich that uses buttermilk herb mayo made with chives, parsley, and thyme. The sandwich costs $6.29. Shake Shack had been trying out its new sandwich at its Brooklyn, New York locations since last summer and decided to make it available nationally on Thursday.
