Preheat the waffle iron according to the manufacturer's instructions. 2. Sift flours, baking powder, corn starch, and salt in a medium bowl and set aside. 3. In a second bowl, whisk egg yolks and sugar until the sugar is dissolved and the eggs have lightened to a pale yellow. 4. Add vanilla extract, melted butter, milk and butter milk to the egg mixture. 5. Combine the milk mixture to the flour mixture and whisk until everything is blended but don't over mix. 6. Use an electric mixer to whisk egg whites in a third bowl until the egg whites form stiff peaks. 7. Fold the egg whites into the waffle batter using a rubber spatula. Do not over mix. 8. Spray the waffle iron with non-stick cooking spray and pour about a ladle full of batter into the waffle iron. Close and cook the waffle per manufacturer's instructions until golden brown.
Blueberry Maple Syrup
Combine blueberries, maple syrup, and lemon juice in a saucepan over mediumheat. 2. Stir until combined. 3. Put the cornstarch into a small cup with water and whisk until smooth. 4. Add the cornstarch mixture into the blueberries and turn up the heat, stirring constantly. 5. When the sauce boils, reduce the heat to medium high and stir until thickened, about 5 minutes. Serve with your waffles.