Add all purpose flour, sugar, baking powder and baking soda into a large bowl and whisk to combine.
Stir buttermilk and melted butter together. Tip: If your buttermilk is cold or if the melted butter is not warm, you might notice some lumps in the combined liquid. However, it's perfectly acceptable to proceed with the recipe.
Pour the combined liquid into the dry ingredients and stir to combine, until it just comes together.
Grease waffle iron with non-stick cooking spray, ladle a scant ½ cup batter into each waffle square and cook waffles according to manufacturer's instructions or until golden brown color.
Serve hot with maple syrup and berries.
Video
Notes
Cook each batch until they get a deep golden brown for a crispy texture. It took about 6 minutes in my waffle iron.Avoid overmixing. The same principle applies to all waffle batters. It's preferable to have small pockets of dry flour remaining rather than over-mixing to achieve a perfectly smooth consistency.