The cronut — a hybrid of a croissant and doughnut — was invented at the Dominique Ansel Bakery in Manhattan. Now, it's inspiring imitators. The doughnut with flaky layers is being made around the world from Japan to Australia and the U.K. Even Dunkin' Donuts is getting into the game. The news site Quartz reports that in South Korea, Dunkin' is offering a version it's calling "New York Pie Donuts."