Ingredients :
- 2 cups all-purpose flour
- 1/2 cup granulated sugar
- 2 teaspoons baking powder
- 1/2 teaspoon baking soda
- 1/4 teaspoon salt
- 1/2 cup unsalted butter, at room temperature
- 1/2 cup sour cream
- 2 eggs
- 1 teaspoon vanilla extract
- 1 cup fresh blueberries
Topping:
- 1/2 cup all-purpose flour
- 1/2 cup granulated sugar
- 1/2 teaspoon ground cinnamon
- 1/4 cup unsalted butter, at room temperature
Directions :
- Preheat the oven to 350 degrees F (175 degrees C) and grease and flour an 8×8 inch baking pan.
- In a medium mixing bowl, combine flour, 1/2 cup sugar, baking powder, baking soda, and salt.
- In a separate mixing bowl, cream together butter and sour cream.
- Beat in eggs and vanilla extract.
- Gradually add the dry ingredients to the wet ingredients, mixing until well combined.
- Gently fold in the blueberries.
- Pour the batter into the prepared baking pan.
- In a small mixing bowl, combine 1/2 cup flour, 1/2 cup sugar, and cinnamon. Cut in butter until mixture resembles coarse crumbs.
- Sprinkle the topping evenly over the batter.
- Bake for 40-45 minutes, or until a toothpick inserted into the center comes out clean.
- Remove the cake from the oven and let it cool completely before serving.
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