Whisk together flour, sugar, baking powder, and salt in a bowl.

In a separate bowl, whisk egg and milk.

Create a well in the center of the dry ingredients.

Slowly pour the egg-milk mixture into the well, mixing gently to combine.

Add melted butter and vanilla extract.

Stir until just combined; the batter should be slightly lumpy.

Do not overmix.

Heat a lightly oiled griddle or frying pan over medium heat.

Pour 1/4 cup of batter onto the hot griddle for each pancake.

Cook until bubbles form on the surface and the underside is golden brown.

Flip and cook the other side until golden brown.

Serve immediately with your favorite toppings.