Leave it to the Big Apple. Only in New York City could there be a black market for doughnuts. Well, that’s not completely accurate. The black market is actually for cronuts. In case you haven’t heard, a cronut is a cross between a doughnut and a croissant, and it is the hottest thing going right now in a city overflowing with hot things. New Yorkers, it seems, have gone nuts for cronuts.