In a large bowl, sift together the flour, baking powder, salt, and sugar.
Make a well in the center of the flour and pour in the milk, egg and melted butter; mix with a fork or whisk until smooth, but a few pea-sized lumps remain.
Heat a non-stick griddle or large pan over medium-high heat to 325F.
Pour or scoop ¼ cup of batter for each pancake. Wait until bubbles form to flip. Brown on the other side and remove from heat, repeat with remaining batter.
Stack the pancakes and serve with butter and syrup.
Notes
Use the right baking powder: Since pancake batter naturally has a mild, neutral flavor, it's important to use aluminum-free baking powder. The metallic flavor will ruin the taste, especially in fluffy pancake recipes that call for 2 or more teaspoons. Trust me on this one.