Creating Blueberry Buttermilk Pancake Casserole is simple if you follow these steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C) and lightly grease a 9×13-inch baking dish.
2. Mix Dry Ingredients: In a large bowl, whisk together the flour, baking powder, baking soda, salt, and granulated sugar until well combined.
3. Combine Wet Ingredients: In another bowl, whisk together the buttermilk, eggs, melted butter, and vanilla extract until smooth.
4. Combine Mixtures: Gradually add the wet ingredients to the dry ingredients, stirring gently until just combined. Be careful not to overmix; a few lumps are okay.
5. Add Blueberries: Gently fold in the blueberries, ensuring they are evenly distributed throughout the batter.
6. Pour Batter: Pour the batter into the prepared baking dish, spreading it evenly with a spatula.
7. Bake: Place the casserole in the preheated oven and bake for 30-35 minutes, or until the top is golden brown and a toothpick inserted in the center comes out clean.
8. Cool: Remove from the oven and let it cool for about 10 minutes.
9. Cut and Serve: Cut into squares and serve warm, dusted with powdered sugar and drizzled with maple syrup if desired.

These steps will guide you in effortlessly creating this incredible casserole that everyone will adore.