I got this recipe from my mom, who got it from somewhere. I've changed it a lot over the years, but it still works! I used to use white flour, but its even better with spelt or whole wheat flour. No one even noticed when I traded out the eggs for ground flax seed. We reduced the sugar and added mini chocolate chips. Even with all my changes to make them healthier, they keep disappearing wherever I take them. Everyone loves them and asks for the recipe.
I've written the recipe the way that I make it now, but feel free to modify it to your liking, as it is very adaptable. If you want a cupcake, add some cream cheese frosting! If you don't have ground flax seed but do have farm fresh eggs, use those instead! This is the best use of brown and spotty bananas that I know of. It's actually a banana upgrade. If you have a lot of bananas, double or triple the recipe and freeze them for a quick snack later. Yum!