Preheat the oven to 180C/350F. Line a large baking tray or cookie sheet with parchment paper.
In a large mixing bowl, add your oats, mashed banana and peanut butter and mix well. Fold through your chocolate chips, reserving a few to top the cookies with.
Form 12 balls of dough and place on the lined tray. Press each ball into a cookie shape, and top with extra chocolate chips. Bake for 10-12 minutes, before removing from the oven and letting cool completely on the pan.
Notes
* see post for peanut butter substitutions** If you use applesauce instead of banana, you may want to add some sweetener, like maple syrup or agave. TO STORE: Leftovers should always be stored in the fridge, as they spoil easily (do not keep them at room temperature!). Place them in an airtight container or plate covered with plastic wrap.TO FREEZE: Place baked cookies in a ziplock bag or freezer bag. Frozen cookies will keep fresh for at least 2 months.