To a bowl, add banana and sugar. Mash banana until completely smooth.
To same bowl, add oil, vanilla extract and water. Mix.
Sift in flour, baking powder and cinnamon powder.
Pour batter into mold.
Air Fry cake at 340F for 13 min.Then lower to 325F for 15 min. If cake is done, toothpick inserted in the middle of cake comes out clean.
Let cake cool down in mold for 10 minutes. Then transfer to wire rack to cool down completely.
