Decadent Blueberry Cheesecake Crumb Cake

1. Preheat the Oven:
Preheat your oven to 350°F (175°C). Grease and line an 8×8 inch baking dish with parchment paper, leaving an overhang for easy removal.

2. Prepare the Crumb Topping:
In a medium bowl, mix together the flour, granulated sugar, brown sugar, cinnamon, and salt. Stir in the melted butter until the mixture becomes crumbly. Set aside.

3. Make the Cake:
In another medium bowl, whisk together the flour, baking powder, baking soda, and salt. In a large bowl, beat the softened butter and granulated sugar until light and fluffy. Add the egg and vanilla extract, beating until combined. Gradually add the flour mixture, alternating with the buttermilk, beginning and ending with the flour mixture. Mix until just combined. Spread the batter evenly in the prepared baking dish.

4. **Prepare the Cheesecake Layer:
In a medium bowl, beat the cream cheese and granulated sugar until smooth. Add the egg and vanilla extract, beating until well combined. Spread the cheesecake mixture over the cake batter.

5. Prepare the Blueberry Layer:
In a small bowl, toss the blueberries with the sugar and cornstarch. Sprinkle the blueberry mixture evenly over the cheesecake layer.

6. Add the Crumb Topping:
Sprinkle the prepared crumb topping evenly over the blueberries.

7. Bake:
Bake for 50-60 minutes, or until the topping is golden and a toothpick inserted into the center comes out clean. Allow the cake to cool completely in the pan on a wire rack before removing and slicing.

Enjoy this delightful Decadent Blueberry Cheesecake Crumb Cake, a perfect blend of creamy, fruity, and crunchy layers!