1. Weigh or lightly spoon flours into dry measuring cups; level with a knife. Combine flours, sugar, and next 3 ingredients (through salt) in a large bowl, stirring with a whisk. Combine buttermilk, oil, egg, and egg white, stirring with a whisk. Add buttermilk mixture to flour mixture, stirring just until moist.
2. Heat a nonstick griddle or nonstick skillet over medium heat. Coat pan with cooking spray. Spoon about 1/4 cup batter per pancake onto griddle. Turn pancakes over when tops are covered with bubbles and edges look cooked. Serve with syrup and butter.