Mix flour, sugar, baking powder, salt and berries in a bowl. Add the milk, melted butter, and egg to the dry ingredients and mix together with a fork just until completely wet. Don't over mix, batter will be thick and lumpy.
Lightly spray muffin tin liners with cooking spray and fill with batter, sprinkle with coarse sugar. Bake for 20 to 25 minutes. Enjoy warm.
You can substitute the blueberries for chocolate chips or other berries.