In a small bowl, use a fork to slightly mash the blueberries with 2 tablespoons sugar. Set aside.
In a large bowl, whisk together the milk, eggs, remaining sugar, butter and vanilla. Stir in the blueberries. Mix in the flour, baking powder, soda and salt until just combined. Batter will be thick.
Heat a griddle or a nonstick skillet. Ladle 1/2 cup of batter onto griddle and spread of batter. Cook for a couple minutes or until bubbles appear on the surface. Flip and cook for another minute. Repeat with remaining batter. Serve warm with maple syrup.