In a large bowl, combine blue cornmeal, all-purpose flour, baking powder, baking soda, salt, and brown sugar.

Whisk gently to blend the dry ingredients.

Preheat waffle iron according to manufacturer's instructions.

In a separate bowl, whisk together low-fat buttermilk and egg until well blended.

Pour the wet ingredients into the dry ingredients.

Gently fold the mixture until just evenly moistened. Avoid overmixing.

Pour about 1 cup of batter into the preheated waffle iron.

Cook until the waffle is golden brown and cooked through, usually 3-5 minutes.

Serve immediately.