Mash the bananas with a fork or process them in a small blender.
Add the other ingredients and combine until you get a malleable mixture ( you might need to add more oats). Let it rest for 10 minutes.
Turn the oven on to 180°C and line a baking tray with parchment paper.
Make 6-8 equal sized balls from the mixture, then press them slightly between your palms.
Put the cookies on the prepared baking tray.
Bake in the middle of the oven for about 10-15 minutes until golden.
Cool the cookies on a wire-rack then serve.