6. Gently fold in the fresh blueberries to distribute them evenly throughout the batter.
7. Pour the batter into your prepared pan, spreading it out evenly.
8. Bake the cake for about 45-50 minutes. You’ll know it’s done when a toothpick inserted into the center comes out clean.
9. Once the cake is baked, let it cool down before serving. Enjoy your homemade blueberry sour cream coffee cake!