Lightly spoon flour into dry measuring cups; level with a knife. Combine flour, sugar, baking powder, and salt in a bowl; stir with a whisk. Combine buttermilk, butter, and egg; add to flour mixture, stirring until smooth.
Pour about 1/4 cup batter per pancake onto a hot nonstick griddle or nonstick skillet. Cook 2 minutes or until tops are covered with bubbles and edges look cooked. Carefully turn pancakes over; cook 2 minutes or until bottoms are lightly browned.