Preheat waffle iron.

In a large bowl combine together flour, baking powder, baking soda, salt and cornstarch. Set aside.

In a medium bowl whisk together buttermilk, oil, vanilla and egg yolks until combined.

In a stand mixer with the whisk attachment add egg whites and sugar and beat on medium high until soft peaks form.

Fold in the egg whites to the batter.

Cook batter in waffle iron according to manufactures directions.

In a medium shallow bowl combine sugar and cinnamon.

When the waffles are done brush each of them with the melted butter.

Dip each waffle in the cinnamon and sugar mixture.

Serve immediately with syrup if desired.