Preheat your waffle maker according to the manufacturer’s instructions.
In a large mixing bowl, whisk together the all-purpose flour, white whole wheat flour, baking soda, baking powder, salt, and sugar until well combined.
In another bowl, beat the eggs and then add the melted butter and buttermilk. Mix until everything is well blended.
Pour the wet ingredients into the bowl of dry ingredients. Gently fold the mixture until just combined. Avoid overmixing.
Lightly grease the waffle maker with cooking spray or a brush of oil. Pour the batter into the center, close the lid, and cook for about 4-5 minutes or according to your waffle maker’s instructions.
Carefully remove the waffles and place them on a cooling rack to cool completely.
Stack the cooled waffles with parchment paper between each, place in an airtight container or freezer-safe bag, label, and freeze for up to 3 months.