"A crisp, often sweet, very thin, flat, and dry biscuit often used to decorateice cream. Wafers can also be made intocookieswith cream flavoring sandwiched between them. They frequently have a waffle surface pattern but may also be patterned with the insignia of the food's manufacturer or may be patternless. Many chocolate bars such asKitkatand Coffee Crisp have wafers in them." - Wikipedia
wafer