Preheat oven to 350 degrees and grease a loaf pan, set aside
Add mashed bananas, flax eggs, maple syrup, oil, vanilla, baking soda, cream of tartar, cinnamon, and salt to a large mixing bowl and whisk until combined
Add flours and mix gently with a spatula to combine
Optional: add in blueberries, chocolate chips, walnuts, or anything else you’d like!
Pour batter into prepared loaf pan and bake for 45 minutes or until a toothpick comes out clean
Let cool for 15 minutes on a cooling rack and then remove from the pan
Slice, serve and enjoy!