Preheat waffle iron
In a large bowl whisk cake flour, baking powder and salt until blended.
In a different bowl beat eggs and buttermilk until well blended.
Add flour mixture to and mix lightly with a fork until combined.
Add butter and the mixture should now be lumpy. Leave lumps
Pour 1/2 to 3/4 cup of batter on the center of the waffle iron and spread to the edges
Quickly add 5-6 blueberries to the waffle batter.
Cook waffle until the waffle iron steam stops or follow manufacturer's instructions.
Immediately serve waffles with maple syrup or your favorite jam. Feel free to top with more blueberries.