Mix sour cream, zest and sugar in a bowl until smooth; refrigerate.
Combine flour, oats, baking powder, baking soda, cinnamon and salt in a bowl. Make a well in the center of flour mixture. Place egg white, honey, chocolate chips and milk in well. Stir liquid with a wooden spoon until flour is just combined. Heat a griddle over medium heat and coat with cooking spray. Pour 1/4 cup batter per pancake onto griddle and cook until bubbles appear on surface and undersides are golden brown, about 1 minute. Flip and cook other side, about 1 minute more. Top with a spoonful of sour cream mixture and berries.
335 calories, 6.4 g fat (3.1 g saturated), 58.9 g carbs, 6.6 g fiber, 15 g protein