Enjoy this refreshing and delicious buttermilk mango berry crumb cake that combines the sweetness of ripe mangos with the natural tartness of berries. This cake is perfect for any special occasion or as a delightful snack on a sunny day.
1. **Preheat your oven** to 350°F (175°C). Grease a 9-inch round cake pan and set it aside.
2. In a medium bowl, whisk together the flour, baking powder, salt, and granulated sugar.
3. Add the softened butter, egg, buttermilk, and vanilla extract to the dry ingredients. Mix until the batter is smooth and well combined. Gently fold in the diced mango and mixed berries.
4. Pour the batter into the prepared cake pan. Bake for 30-35 minutes or until a toothpick inserted into the center comes out clean.
5. While the cake is baking, prepare the crumb topping. In a small bowl, mix together the flour, brown sugar, salt, and softened butter until the mixture resembles coarse crumbs. Set aside.
6. Once the cake has baked, remove it from the oven and spread half of the crumb topping evenly over the warm cake. Return to the oven and bake for an additional 5-7 minutes or until golden brown on top.
7. Allow the cake to cool in the pan for about 10 minutes before transferring to a wire rack to cool completely.
8. Serve the buttermilk mango berry crumb cake chilled or at room temperature, garnished with extra berries if desired.
#### Tips and Variations
- For a richer flavor, use fresh-squeezed lemon juice instead of vanilla extract.
- Swap out different types of berries for variety – you can even mix in some chopped almonds or walnuts into the batter for added texture.
- Consider serving this cake with a dollop of whipped cream or Greek yogurt to enhance its creamy and tangy flavors.
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By following these detailed steps, you'll have a beautifully textured buttermilk mango berry crumb cake that is sure to please any dessert lover!