Preheat the oven to 350°.
Line a 9 x 5 loaf pan with parchment paper and grease lightly with cooking spray.
Beat the mashed banana and vegan butter on medium high until well combined.
Add the brown sugar. Continue beating on medium high until well combined.
Fold the flour and baking soda into the wet ingredients until just combined. Lastly, fold in ¾ cup chocolate chips (if using).
Pour the batter into the loaf pan and spread into an even layer. Sprinkle with remaining ¼ cup.
Bake for 50-55 minutes or until a toothpick comes out clean. Cool on a wire rack for 1-2 hours before slicing.
Use parchment paper to remove the loaf from the pan. Slice and enjoy!