Preheat your oven to a toasty 350°F. Grab a 9-inch x 5-inch loaf pan and line it with parchment paper for an easy release. Lightly grease with coconut oil.
In a large bowl, mash those ripe bananas until smooth.
To the bananas, add the brown sugar, melted coconut oil, vanilla extract, and salt. Stir it all together until it's as harmonious as your favorite yoga class.
In a separate bowl, whisk together the whole wheat flour, baking powder, baking soda, and cinnamon.
Gently fold the dry ingredients into the wet mix. Stir until just combined, do not overmix.
Add chopped walnuts or pecans now (optional).
Pour the batter into your prepared pan and smooth the top. Pop it in the oven and bake for about 50 to 55 minutes. If the top is getting too tan, tent it with foil around the halfway mark.
Let the bread cool in the pan for about 10 minutes, then transfer it to a wire rack to cool completely.