Pre-heat oven to 350 degrees.
In a medium bowl, combine dry ingredients - flour, baking soda, baking powder, and salt.
Mash bananas in a small bowl. Set aside.
In a large bowl, combine wet ingredients - granulated sugar, brown sugar, softened unsalted butter, vanilla extract, egg, and mashed bananas.
Add dry ingredients into wet ingredients. Use a spatula to mix well and combine. Fold in chocolate chips.
Drop large spoonfuls of dough onto baking/cookie sheet lined with parchment paper or baking mat. Note: consistency of dough is slightly more runny than regular chocolate chip cookie dough.
Bake for 12-13 minutes.
Remove baking/cookie sheet from oven and let cookies sit for 1-2 minutes (not more than that!), then transfer them to baking rack to cool for 5 minutes.
Serve and enjoy!