Zimtsterne are crispy star-shaped German and Austrian cookies. They are made with a combination of whipped egg whites that are mixed with sugar, cinnamon, ground nuts—traditionally almonds with the occasional addition of hazelnuts—and vanilla sugar.
The dough is rolled and cut into star-shaped cookies. After baking, each cookie is coated with a layer of white frosting that is made from a combination of egg whites and sugar. The name of these cookies translates as cinnamon stars, due to the heavy use of the aromatic spice.