Pre-heat the oven to 175C / 350F.
Mix the oats, flour, cinnamon, baking soda, baking powder, and salt together in a bowl.
In a separate bowl, mix together the banana, eggs, vanilla, melted coconut oil, and maple syrup. Make sure the oil isn't too hot - you don't want scrambled eggs!
Pour the wet ingredients over the dry and mix well to fully combine.
Fold in the chocolate chips and walnuts.
Roll mixture into golfball sized portions and place on a lined baking sheet. Use a fork to press the dough down into shape.
Bake for 12 minutes. Remove from oven and allow to cool on a wire rack. Enjoy!
