In a bowl, combine flour, sugar, baking powder, and salt.
In another bowl, whisk together milk, eggs, and melted butter.
Pour the wet ingredients into the dry ingredients and stir until just combined, being careful not to overmix.
Preheat a pan over medium-low heat and lightly grease with oil.
Pour a ladle of batter onto the pan, and when bubbles appear on the surface, flip and cook the other side.