1Preheat your oven to 350 degrees and generously grease a mini muffin pan. In a large bowl, mix together the smashed banana, oats and vanilla.
Add in the mix-ins of your choice; stir to combine. Spoon the mixture into your muffin pan, filling them up close to the top.
Bake for 15-18 minutes and allow to cool for 5 minutes. Store any leftovers in the fridge for up to 5 days.