Another optional idea is to mix in a very small amount of green banana powder with the batter. (thehealthyhomeeconomist.com)
To make banana powder, more than 95 percent of the water in a ripe banana is removed by the drying process. (healthyeating.sfgate.com)
With more than 10 percent of the daily value for potassium per serving, both fresh bananas and banana powder qualify as good sources of the nutrient. (healthyeating.sfgate.com)