In a bowl, mix the flour, sugar, baking powder, and salt.

In a separate bowl, whisk the milk, egg, melted butter, and vanilla extract.

Pour the wet ingredients into the dry ingredients and mix until smooth (avoid overmixing).

Gently fold in the chocolate chips.

Heat a non-stick skillet over medium heat and pour 1/4 cup of batter for each pancake. Cook until bubbles form on the edges, then flip and cook until golden brown.