Preheat oven to 350 degrees.
Peel and mash bananas. Add vanilla extract and mix well.
Whisk eggs and add to mashed bananas.
Using a hand mixer or whisk, mix butter and sugar until very well incoprorated. Butter/sugar mixture should be creamy.
Combine flour, baking soda, salt.
Add flour mixture into banana mixture and combine.
Add 2/3 of the chocolate chips into the bowl and mix.
Butter and lightly dust a bread pan with flour. Pour mixture into pan. Shake gently to even out the mixture. Top with remaining chocolate chips. Sprinkle brown sugar on top.
Bake in preheated oven for 50 - 55 minutes or until a toothpick runs clean when checking the center.
Remove from oven and sit to cool in pan for 10 minutes before placing on a wire rack. Cool for 30 minutes for cutting into.