Preheat the oven to 350°F (175°C) and line a baking pan with parchment paper.

In a large bowl, combine the mashed bananas, eggs, maple syrup, peanut butter, avocado oil (or applesauce), and vanilla extract. Mix well.

In another bowl, whisk together the oats, baking powder, cinnamon, and kosher salt.

Gradually add the dry ingredients to the wet mixture, stirring until fully combined.

Fold in the chocolate chips.

Pour the batter into the prepared baking pan and spread it evenly.

Sprinkle additional chocolate chips and flaky sea salt on top, if desired.

Bake in the preheated oven for 30 minutes or until golden brown and firm to the touch.

Allow to cool in the pan before cutting into bars.