Strudel is made of a thin, elastic pastry. The filling contains sliced apples, sugar, cinnamon, raisins, and bread crumbs. Preparing the strudel dough is a difficult process, so you can also buy strudel pastry. Apple strudel can also be made with puff pastry. Traditionally, the strudel is served warm with whipped cream or vanilla ice cream. Also, vanilla sauce is popular in many countries.