Combine first 4 ingredients in a large bowl; make a well in center of mixture.
Stir together buttermilk, eggs, and butter. Add to dry ingredients, stirring just until moistened. Fold in apple.
Pour 1/4 cup batter for each pancake onto a hot, lightly greased griddle. Cook until tops are covered with bubbles and edges look cooked; turn and cook other side.
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