- Preheat the oven to 350ºF.
- In a large bowl, mix together the peanut butter, maple syrup, vanilla extract and bananas. Stir in the rolled oats, and desired mix-ins.
- Scoop the cookies onto a parchment-lined baking sheet and, using a fork, press them down slightly. Bake the cookies until they have firmed up and are lightly golden, 13 to 15 minutes.
- Allow to cool for at least five minutes before enjoying!
*For a fun twist, before baking, try pressing your thumb into the centre of each cookie dough ball and fill it with your favourite jam!