Kit Kat Extra Crispy Chocolate Bar from Hershey. Need an extra crispy break? These Kit Kat wafer bars are the same light, crispy wafer wrapped in chocolate. The difference with the Kit Kat Extra Crispy is there are even more wafers to enjoy, making Kit Kat Extra Crispy crunchier and more of a mouthful. Smooth milk chocolate and crispy wafers are what make Kit Kat a delicious treat.