Combine flour, sugar, baking powder, soda, and salt in a medium mixing bowl. Combine buttermilk and eggs; slowly stir into dry ingredients. Add butter, mixing lightly. (Batter will be lumpy. )
For each pancake, pour 1/4 cup batter onto a hot, lightly greased griddle or skillet. Cook until tops of pancakes are covered with bubbles and edges appear slightly dry. Turn and cook until bottom sides are browned. Serve immediately.