Preheat the oven to 350ºF and line a 9-inch by 5-inch loaf pan with parchment paper. (Tip: I spray the pan with cooking spray, then line the pan to keep the parchment paper in place.)
In a large bowl, combine the mashed banana, coconut sugar, almond butter, flour, baking powder, cinnamon, salt, and vanilla. Stir well to combine, until all of the flour is mixed in and the batter looks relatively uniform.
Pour the batter into the prepared loaf pan and smooth the top with a spatula. Bake the loaf at 350ºF for 50 minutes, or until the top has risen and a toothpick placed in the center of the bread comes out relatively clean. Let the bread cool completely.
Once the bread is completely cool, use the parchment paper to help you lift it out of the loaf pan. Slice and serve! This bread can be stored at room temperature for up to 48 hours, but I recommend storing it in the fridge for longer shelf life. It should keep well for up to a week in an airtight container in the fridge.