01 - Preheat oven to 350°F and line an 8x8-inch baking pan with parchment paper.
02 - In a large mixing bowl, blend mashed bananas, peanut butter, eggs, maple syrup or honey, and vanilla extract until smooth.
03 - Incorporate ground cinnamon, fine sea salt, and baking soda into the mixture, stirring thoroughly.
04 - Gently fold in dark chocolate chips if desired.
05 - Transfer batter to the prepared pan and distribute evenly.
06 - Bake for 20 to 22 minutes or until the center is set and a toothpick inserted emerges clean.
07 - Allow to cool completely in the pan before cutting into bars.