A whippet is a cookie that is only made in Montreal. It consists of a biscuit base topped with marshmallow and then coated in a hard shell of pure chocolate. Since the coating is pure chocolate, it is very prone to melting, and as a result is available in very few areas outside of Montreal. Many people eat whippets in a ritualistic fashion. A common method is to smash the marshmallow side of the cookie on your forehead to break the chocolate coating before taking your first bite. I am not sure this would be an apt way of eating a Whippet Cupcake though since most of the frosting will likely end up in your hair rather than in your mouth!