1. Turn on your waffle iron and allow to preheat while preparing the batter.
2. Whisk together the two flours, baking powder, and salt in a large bowl.
3. Combine the milk, eggs, butter, and vanilla in a measuring cup. Stir until combined and slowly stir into your dry ingredients. Fold in your blueberries.
4. Scoop your batter onto your waffle iron and cook according to the directions.