Preheat oven to 375°F.
In a medium bowl, mash bananas with a fork, then add the rest of the wet ingredients, mixing until well combined.
In a large bowl, whisk together all the dry ingredients making sure to get rid of any lumps.
Pour the wet ingredients into the dry ingredients and mix together well. It's okay to have some clumps in the mixture from the bananas.
If choosing the optional ingredients, fold them in now.
Pour batter into a greased bread pan.
Bake for one hour or until a toothpick comes out clean.
Let cool in the pan for 10-15 minutes, carefully remove from pan and let cool further for about 20 more minutes.