Absolutely! While the classic combination of fresh raspberries paired with streusel is undeniably delicious, you can certainly customize your Raspberry Streuseltaler to suit your tastes or use available ingredients. For instance, you can swap the raspberries for other fruits like blueberries, strawberries, or even a mix of berries, creating delightful variations. For a more decadent twist, consider adding a layer of cream cheese or custard beneath the fruit filling. Also, the streusel can be enhanced by incorporating nuts or spices, such as cinnamon or almond extract, to give an extra flavor boost. The adaptability of this recipe makes it a perfect canvas for your culinary creativity, allowing you to experiment while still achieving that signature pastry texture.