bar consisting of a bar of a toffee
surrounded by caramel
s and covered in milk chocolate. Oh Henry's ads generally play on its hunger satisfying qualities, since most of the time it is the heaviest standard-sized chocolate bar on the market. (though it has been surpassed at times by wunderbar and sweet marie and various others, most of these later switched back to a smaller, more economically viable form.)
The name is a mystery. Is it a tribute to O. Henry? If so, it takes a bizarre form.