Instructions:
- Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking pan for the coffee cake.
- In a large mixing bowl, cream together the softened unsalted butter and granulated sugar until light and fluffy.
- Add the eggs one at a time, beating well after each addition.
- Stir in the sour cream and vanilla extract, mixing until well combined.
- In a separate bowl, whisk together the all-purpose flour, baking powder, baking soda, and salt.
- Gradually add the dry ingredients to the wet ingredients, mixing until a smooth batter forms.
- Gently fold in the fresh blueberries, being careful not to overmix.
- In a small bowl, combine the brown sugar and ground cinnamon to create the streusel topping.
- Pour half of the cake batter into the prepared baking pan, spreading it evenly.
- Sprinkle half of the streusel topping over the batter in the pan.
- Pour the remaining cake batter over the streusel layer, covering it completely.
- Sprinkle the rest of the streusel topping over the top of the cake.
- Bake the Blueberry Sour Cream Coffee Cake in the preheated oven for approximately 30-35 minutes or until a toothpick inserted into the center comes out clean.
- Remove the cake from the oven and let it cool slightly before slicing and serving.
Enjoy a slice of warm and tender Blueberry Sour Cream Coffee Cake with your favorite beverage!
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