In a large mixing bowl, combine flour, baking powder, salt, and sugar. Whisk until no lumps remain.

In a separate bowl, mix milk, egg, melted butter, and vanilla extract. Whisk until smooth.

Pour the wet mixture into the dry ingredients, stirring gently until just combined.

Preheat a non-stick skillet or griddle on medium-low heat, then coat lightly with butter or oil.

Pour about 1/4 cup of batter onto the skillet for each pancake. Cook until bubbles appear, about 2-3 minutes.

Carefully flip the pancakes and cook for another 2-3 minutes until golden brown and cooked through.

Repeat until all the batter is used, coating the skillet with butter as needed.

Stack the pancakes and serve immediately with your favorite toppings.