Add the flour, baking soda, cinnamon, and salt to a medium bowl and whisk together. Set aside.

In a large bowl, whisk melted butter, brown sugar, and sugar until combined.

Add egg and vanilla extract, whisk until well combined. Mix in mashed bananas.

Fold in the dry ingredients just until combined.

Stir in chocolate chips until dispersed throughout the dough.

Refrigerate the dough for at least 2-3 hours, preferably overnight.

Preheat oven to 350°F. Line baking sheet with parchment paper or silicone mat.

Scoop 2-tablespoon portions onto the prepared baking sheet. Optional: press additional chocolate chips on top.

Bake for 10-12 minutes or until edges are golden. Remove and cool on a wire rack.

Enjoy your cookies once cooled!