Creating the Buttermilk Blueberry Breakfast Cake is straightforward if you follow these simple steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C). Grease a 9×13 inch baking pan.

2. Mix Dry Ingredients: In a large bowl, whisk together the flour, baking powder, baking soda, and salt. Set aside.

3. Cream Butter and Sugar: In another bowl, beat the softened butter and granulated sugar until light and fluffy.

4. Add Wet Ingredients: Add eggs, buttermilk, and vanilla extract to the butter mixture. Mix until well combined.

5. Combine Mixtures: Gradually add dry ingredients to the wet ingredients. Mix just until incorporated. The batter should be smooth but not over-mixed.

6. Fold in Blueberries: Gently fold in the blueberries, being careful not to break them.

7. Pour into the Pan: Transfer the batter into the prepared baking pan, smoothing the top evenly.

8. Bake: Place in the oven and bake for 30-35 minutes or until a toothpick inserted in the center comes out clean.

9. Cool: Remove from the oven and let the cake cool in the pan for 10-15 minutes. Then transfer it to a wire rack to cool completely.

10. Serve: Once cooled, slice and serve as desired. Optionally, dust with powdered sugar or serve with a dollop of whipped cream.

With these steps completed, you will have a scrumptious Buttermilk Blueberry Breakfast Cake ready for everyone to enjoy!