Whisk together the flour, sugar, baking powder, and salt in a mixing bowl, preferably one with a pourable spout.

In another bowl, whisk together the milk, eggs, melted butter, and vanilla. Add to the dry ingredients and stir lightly. Don't over-mix or the pancakes will be tough.

Spoon batter onto a medium hot griddle, and sprinkle blueberries over the batter. Cook till bubbles form, then flip pancakes over and cook till golden brown. Serve hot with maple syrup or buttermilk syrup.