In a large mixing bowl, sift together the flour, baking powder, sugar, and salt. Create a well in the center of the dry ingredients, then pour in the milk, melted butter, and egg. Stir until the batter is smooth and well combined.

Preheat a lightly greased griddle or skillet over medium-high heat. For each pancake, ladle about 1/4 cup of batter onto the hot surface. Cook until bubbles begin to appear and the edges start to look dry, which should take about 2 to 3 minutes. Carefully flip the pancakes and continue to cook until the other side is golden brown. Repeat the process with the remaining batter, ensuring consistent cooking for each batch.