Preheat oven to 350 degrees F. Line a baking sheet with parchment.
Mash the bananas in a large bowl and add the oats. Mix until well combined. Add the chocolate chips, and stir.
Scoop the mixture onto your cookie sheet about 2 inches apart and bake for about 10 minutes. While the cookies might be a tiny bit browned from the oven, they’ll look pretty much the same as they did when they went in. Let them cool, and try not to eat them all!