Light and Fluffy Whole Wheat Waffles

0 Separate egg whites and yolks into bowls, placing yolks in a small bowl and whites in a medium bowl.
2 In a large mixing bowl, combine egg yolks, brown sugar, and oil. Beat with a whisk.
4 Add buttermilk and whisk until combined.
6 Add flour, baking powder, and salt at once and stir until smooth.
8 Return to egg whites and beat until stiff peaks form. 
10 Gently fold egg whites into batter.
12 Heat a waffle iron according to manufacturer’s instructions.
14 Spray with nonstick cooking spray.
16 Cook waffles until golden brown on both sides.
18 Serve waffles immediately with butter, syrup, and fresh berries.