These cookies are so chewy and delicious it will make you want to let your bananas turn brown, just so you can make them! We even froze half the batch and ate them a week or two later and they were just as good!
Preheat oven to 375 degrees. Whisk together flour, salt, and baking soda in a small bowl and set aside. Place butter and sugars into a mixing bowl and beat on medium speed until pale and fluffy. Reduce speed to low. Add egg and vanilla and mix until combined. Mix in banana. Add flour and mix until just combined. Stir in oats and chocolate chips. Using a 1 1/2-inch ice cream scoop or cookie scoop, drop dough onto baking sheets spacing about 2 inches apart. Bake cookies until golden brown and just set, about 12 to 13 minutes.