Spray a waffle iron with nonstick cooking spray, and preheat to high.
In a large bowl, stir together cornmeal, flour, baking powder, salt, and baking soda. In another medium bowl, stir together buttermilk, melted butter, and eggs. Slowly add wet ingredients to dry ingredients, stirring just until combined.
Using a measuring cup, pour approximately ⅓ cup batter onto waffle iron. Cook, without lifting lid, until golden brown and crisp, approximately 5 minutes. Repeat with remaining batter. Place cooked waffles in a 200° oven while preparing remaining waffles.
Recipe by Taste of the South at https://tasteofthesouthmagazine.com/chicken-cornbread-waffles/