Preheat oven to 350 degrees.
Mash peeled bananas in a large mixing bowl.
Add in the melted butter, beaten egg, sugar, and vanilla. Stir well.
Sprinkle the salt, baking powder, baking soda and optional cinnamon over the mixture. Stir.
Add in the flour and stir to combine. Stir until all flour in incorporated. Fold in chocolate chips (and other optional add-ins).
Split the batter between two greased loaf pans. Bake in preheated oven for 45-50 minutes.