Mash half a banana in a bowl, then add the peanut butter, vanilla extract, maple syrup, baking powder and oats. Mix to combine.
Add half the dark chocolate chips and form the mix into a ball.
Press into a cookie shape, then press the remaining chocolate into the top and place into a dish that fits into your air fryer.
Select Air Fry and set the temperature to 190C and time to 10 minutes.
When the display prompts to add food, place the cookie mix inside.
Once cooked, serve topped with Greek yogurt and extra maple syrup.