Heat 4 tablespoons (50g) of butter in a hot pan until frothy. Add the bread crumbs and heat until golden brown, stirring constantly.
Melt 4 tablespoons (50g) of butter and brush the dough.
Evenly spread the bread crumbs and nuts over about half of the dough approximately 2 to 4 inches (5-10 cm) from the top of the dough. Add the apples mixed with the drained raisins.
Melt the remaining 4 tablespoons (50g) of butter, and brush the apfelstrudel generously.
Bake for about 45 minutes in an oven preheated to 350 F / 180 C.