Preheat the oven to 180°C / 160°C fan / gas mark 4 and line a baking tray with baking paper.
Add the mashed bananas to a large bowl.
Stir in the gluten-free oats, cinnamon, maple syrup, and vanilla extract.
Mix until everything is well combined.
Fold in the raisins or dairy-free chocolate chips if using.
Spoon small mounds of the mixture onto the prepared tray.
Shape them gently into bite-sized rounds.
Bake for 12–15 minutes until lightly golden and set.
Leave to cool on the tray for a few minutes before transferring to a wire rack.