Mix flour, baking powder, salt, and sugar in a large bowl
In another bowl, whisk together the milk, egg, butter, and vanilla.
Add the milk mixture to the flour mixture, and stir until the batter is JUST combined (see notes).
Add the chocolate chips and gently fold to combine.
Heat a large non stick griddle or skillet over medium heat, and grease lightly with butter.
Pour 1/2 cup batter into circles.
Flip once bubbles appear and sides are lightly golden brown.
Serve with butter and maple syrup.