In a large bowl sift together the flour, baking powder, baking soda and the salt. Set aside.

In another small bowl whisk together the egg yolks, milk, butter and vanilla. Set aside.

In a bowl or stand mixer whip the egg whites until soft peaks form and slowly add the sugar. Continue whipping until stiff peaks form.

Add the wet ingredients to the dry and mix together. Using a spatula, gently fold in the whipped egg whites and incorporate until combined.

Cook waffles per your waffle manufacturer’s instructions.

Brush each cooked waffle on both sides with butter and dredge each side in a bowl of the cinnamon sugar. Press to adhere all over.