Preheat your oven to 350°F (175°C).
In a mixing bowl, mash the ripe bananas until smooth.
Add the softened butter, brown sugar, and granulated sugar. Mix well.
Beat in the egg and vanilla extract until combined.
In another bowl, whisk together the flour, baking soda, and salt.
Gradually add the dry ingredients to the wet ingredients, mixing until just combined.
Fold in the chocolate chips.
Drop tablespoon-sized portions of dough onto a baking sheet lined with parchment paper.
Bake for 12-15 minutes, or until the edges are golden brown.
Remove from the oven and let cool on a wire rack.