Preheat oven to 400 degrees.Spray muffin tin with cooking spray.Combine all dry ingredients in a large bowl.In a separate bowl whisk together the milk, egg, oil and vanilla.Add the wet ingredients to the dry ingredients. Stir just until all of the ingredients are combined.Gently fold in the blueberries.Divide the batter evenly between the 12 muffin cups.Sprinkle the tops of the muffins with the coarse sugar.Bake for approximately 20 minutes until muffins are lightly browned and a toothpick comes out clean.