Make German streusel by whisking together 3 1/3 cups of flour, 1 cup of sugar, 1/4 teaspoon of baking powder, 1/4 teaspoon of salt and 1 tablespoon of vanilla sugar and cutting in 14 tablespoons of cold butter and 2 eggs. Once the mixture turns crumbly, press 2/3 of it into the bottom of a springform pan, spoon in 1 can of pie filling of choice, and sprinkle the rest of the crumb mixture over the top.
Bake the streusel cake at 350 degrees Fahrenheit for 45 to 55 minutes. Allow the cake to cool before serving it with ice cream.
To make another recipe for streusel kuchen or streusel cake, combine 1/2 cup of packed brown sugar, 2 teaspoons of ground cinnamon, 2 tablespoons of all-purpose flour, 2 tablespoons of butter and 1/2 cup of chopped pecans. Put the streusel mixture aside while whisking together 1/4 cup of butter or shortening, 1 beaten egg, 1/2 cup of milk, 1 1/2 cups of all-purpose flour and 2 teaspoons of baking powder for the cake. Stir in 1/2 teaspoon of salt into the batter, and pour it into the pan followed by most of the streusel topping. Run a knife through the batter and streusel to swirl the ingredients together, and then sprinkle the rest of the streusel on top before baking the cake at 350 F for 20 to 25 minutes.