Preheat your oven to 350°F (175°C).
In a bowl, mash the ripe bananas until smooth.
In another bowl, cream together the softened butter and brown sugar.
Add the mashed bananas to the butter mixture and mix well.
Beat in the egg and vanilla extract until combined.
In a separate bowl, whisk together the flour, baking soda, and salt.
Gradually add the dry ingredients to the wet mixture, stirring until just combined.
Fold in the chocolate chips gently.
Drop spoonfuls of dough onto a lined baking sheet, spacing them out.
Bake for 12-15 minutes or until the edges are golden brown.
Allow the cookies to cool on the baking sheet for a few minutes before transferring them to a wire rack.