Buchteln (pl., sing. Buchtel; also Ofennudel(n), Rohrnudel(n)), are sweet rolls made of yeast dough, filled with jam, ground poppy seeds or curd and baked in a large pan so that they stick together. The traditional Buchtel is filled with plum Powidl jam. Buchteln are topped with vanilla sauce, powdered sugar or eaten plain and warm. Buchteln are served mostly as a dessert but can also be used as a main dish. Buchteln desserts are the specialty of the Café Hawelka in Vienna, and are made according to a very old and secret family recipe.