01 - Preheat the oven to 350°F and line an 8x8-inch baking pan with parchment paper for easy removal.
02 - Combine mashed bananas, creamy peanut butter, eggs, maple syrup, and vanilla extract in a large mixing bowl. Whisk until completely smooth and well incorporated.
03 - Sprinkle cinnamon, sea salt, and baking soda into the wet mixture. Stir thoroughly to ensure even distribution of leavening agents and spices.
04 - Gently fold dark chocolate chips into the batter if desired, taking care not to overmix.
05 - Transfer the batter to the prepared baking pan and spread evenly with a spatula to ensure uniform thickness.
06 - Bake for 20-22 minutes until the center is completely set and a toothpick inserted into the middle comes out clean.
07 - Allow the bars to cool completely in the pan before cutting into 8 even portions for clean slices.