In a large bowl, whisk together your dry ingredients. Set aside.
In the bowl of an electric mixer, mash your banana with the paddle attachment on low. Then add the rest of the ingredients on the list (not the dry yet, though!). You may also use a food processor or even just mash and mix by hand, for that matter.
Pour the wet ingredients into the dry and mix until just combined.
Preheat your waffle iron, then make sure you grease it up well with oil or butter or Earth Balance.