1. In a mixing bowl, combine flour, baking powder, and salt.
2. In a separate bowl, whisk together milk, egg, and melted butter.
3. Pour the wet ingredients into the dry ingredients and mix until just combined.
4. Gently fold in the blueberries.
5. Heat a skillet over medium heat and lightly coat with cooking spray.
6. Pour 1/4 cup of batter onto the skillet for each pancake.
7. Cook until bubbles form on the surface, then flip and cook for another 1-2 minutes.
8. Serve hot with a sprinkle of sugar on top.