kit kat is a chocolate bar made from wafers created by rowntree's of york, united kingdom, and is now is made globally by nestlé. the standard bars consist of two or four pieces composed of three layers of wafer, separated and covered by an outer layer of chocolate. each finger can be snapped from the bar separately. there are many different flavours of kit kat, including milk, white, and dark chocolate. it was launched on 29 august 1935.