In a small bowl, whisk together flour and baking powder. Set aside.
In a medium bowl, mix apple sauce, coconut oil, yogurt, and egg yolks. Stir in dry mixture.
In a small bowl, beat egg whites until stiff. Gently fold into batter.
This dog waffle batter will be a bit thicker than a typical waffle batter, so make sure to knife to spread it across the pre-heated waffle iron.Follow your waffle makers instructions to cook waffles completely.Allow to cool and then serve to your dog with the toppings of your choice!