Yogurt Waffles

In a large bowl, whisk together flours, oats, salt, baking powder, and baking soda. In another bowl, whisk together brown sugar, butter, eggs, and yogurt until smooth. Stir egg mixture into flour mixture and mix well to combine. Let batter sit 15 minutes.

Heat waffle iron according to manufacturers instructions; brush with melted butter. Pour 1/2 cup batter onto iron and close; cook until waffle is golden brown and crisp, about 3 minutes. Transfer to a wire rack set on a baking sheet and place in low-temperature oven to keep warm; repeat with remaining batter.