Preheat the oven to 350 degrees.

Line a bread pan with parchment paper and spray with oil or coat with melted butter.

Over medium/high heat in a small saucepan, melt butter until it foams and becomes medium brown. Remove from the heat and let cool for about 5 minutes.

In a standing mixer with a whisk attachment, mix bananas until liquid. Add egg, maple extract, coconut sugar, and browned butter, and combine. Whisk dry ingredients together and add into the banana mixture all at once with the chocolate chips. Mix just until combined, and pour into bread pan. 

Bake in the oven for 55 minutes to an hour. The bread will be done when it no longer jiggles and usually the bread has split on the top. Serve with butter.