This is a trusted classic—it’s invariably the first to be gone at get-togethers.

For a zesty twist, add a teaspoon of lemon zest to the cake batter. You can also substitute the blueberries with raspberries or chopped strawberries for a different flavor profile. If you’re looking for a nutty texture, add some chopped walnuts or pecans to the streusel topping. For a gluten-free version, use a gluten-free flour blend. And if you’re in the mood for a little spice, a pinch of cinnamon or nutmeg in the batter can add a lovely warmth to the cake.