Start by mixing the brown sugar and butter together.
Mix until well combined.
Mix in the banana, egg, sugar,
Add in the rest of the ingredients and mix well.
Spray your bundt ban with non-stick cooking spray or olive oil spray.
Spoon your batter into the prepared pan.
Place your pan into the air fryer basket. SEt the temperature to 320 degrees F, for 17 minutes.
Let cool slightly, before you remove (remember the pan is very hot)
I dusted my cake with confectionary sugar. Just plate, serve and enjoy!