Preheat oven to 350ยบ
Cream together sugars and butter
Add in smashed bananas, 2 eggs, and vanilla extract. Whisk to combine
In a separate bowl, mix together flour, baking soda, salt, and cinnamon
Pour dry ingredients into wet, stir with a wooden spoon until just combined- Do not over mix
If using, stir in chocolate chips
Line a loaf pan with parchment paper and pour in batter
Top with crushed walnuts and sprinkle brown sugar overtop
Bake for 55 minutes or until toothpick come
Let cool 10 minutes before removing from the pan and slicing