Chimney cake is the English name used for the traditional   Romanian product called “Colac secuiesc” .

Chimney cake, also known as Kürtőskalács in Hungarian and Trdelník in Slovak and Czech, is a traditional sweet pastry made from yeast dough and baked around a cylindrical cooking roll. Once baked, it forms a hollow, golden-brown shell that resembles a chimney—hence the name. When the hot pastry is removed from the baking roll, steam often rises from the center, adding to its chimney-like appearance.
Traditionally, chimney cakes are sweet, rolled in sugar before baking and then coated with toppings like cinnamon, coconut or walnuts.