In a large mixing bowl, combine the flour, baking powder, salt, and sugar.
Make a well in the center and pour in the milk, egg, and melted butter. Mix until smooth—some lumps are fine.
Heat a griddle or frying pan over medium-high heat and lightly grease it.
Pour about 1/4 cup of batter onto the griddle for each pancake.
Cook until bubbles form on the surface and the edges look set, then flip and cook until golden on both sides.
Serve warm with your favorite toppings—maple syrup, fresh fruit, or even a pat of whipped butter.