Preheat oven to 325 F. Grease a 9x5 loaf pan and line with parchment paper.
Add the bananas to a large bowl and mash them well using a fork.
Add the maple syrup, coconut oil, and milk. Whisk well to combine.
In the same bowl, add the flour, baking soda, salt, and cinnamon and mix to combine.
Fold in the chocolate chips, reserving some to add to the top of the banana bread.
Pour batter into the loaf pan. Sprinkle remaining chocolate chips on top. Bake for 60-70 minutes, or until a knife inserted in the center comes out clean (see notes re: baking time).