Creating Blueberry Cake Donuts is a breeze when you follow these simple steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C) and grease a donut pan.
2. Mix Dry Ingredients: In a large bowl, whisk together the flour, sugar, baking powder, baking soda, salt, and cinnamon.
3. Combine Wet Ingredients: In a separate bowl, mix the melted butter, buttermilk, eggs, and vanilla extract until fully combined.
4. Combine Mixtures: Pour the wet ingredients into the dry ingredients and stir gently until just combined. Do not overmix.
5. Fold in Blueberries: Carefully fold the fresh blueberries into the batter, ensuring they are evenly distributed.
6. Fill the Donut Pan: Using a pastry bag or a spoon, fill each cavity of the donut pan about ¾ full with batter.
7. Bake: Place the pan in the preheated oven and bake for 10-12 minutes, or until a toothpick inserted into a donut comes out clean.
8. Cool: Once baked, remove the donuts from the oven and let them cool in the pan for about 5 minutes. Then transfer them to a wire rack to cool completely.
9. Dust or Glaze: If desired, dust the cooled donuts with powdered sugar or drench them in a sweet glaze for that extra touch.

By following these straightforward steps, you’ll create a batch of mouthwatering Blueberry Cake Donuts that will leave everyone asking for more!