Whisk the flour, baking powder, salt, and sugar together in a large bowl.
Combine the milk and egg together in a medium-sized bowl.
Add the milk mixture to the dry ingredients, gently stir until combined. Stir in the melted butter and vanilla extract.
Heat your frying pan or griddle to medium and pour the batter on a lightly oiled pan, flip when bubbles start to pop. Cook for an additional two minutes.