Melt the butter in the microwave and set aside. In a large bowl, whisk together flours, oats, baking powder, baking soda and cinnamon. In another bowl, whisk together the milk, yogurt, honey, eggs and vanilla until smooth. Pour the liquid ingredients over the dry ingredients and whisk until just combined. Gently fold in the melted butter.

Preheat and lightly grease the waffle iron.  When the waffle iron is hot, pour batter into the wells of the waffle iron. (Fill according to the manufacturer's instructions).

Close the lid and bake until the waffle is golden and set. Carefully remove waffle from iron and serve warm with maple syrup or a drizzle of honey.

Note: To keep the waffles warm, preheat oven to 200 degrees F. Place a tray of waffles in the oven to keep warm until serving.