Whisk together all dry ingredients: whole wheat flour through salt. In another bowl, combine the mashed banana, milk, vegan butter or oil, aquafaba and vanilla. Gently fold wet ingredients into dry mixture until just combined with no floury streaks.
Grease a waffle iron and cook as directed. Makes approximately 4 waffles.
Notes
To get aquafaba, I simply open a can of chickpeas and drain out the liquid to use. Reserve the chickpeas for another use!