Combine first 6 ingredients in a medium bowl; make a well in center of mixture. Combine buttermilk, oil, and egg white; add to dry ingredients, stirring just until dry ingredients are moistened.
Coat a nonstick griddle with cooking spray; preheat to 350°. For each pancake, pour about 3 tablespoons batter onto hot griddle. Cook pancakes until tops are covered with bubbles and edges look cooked; turn pancakes, and cook other side.