To a bowl add the banana, eggs, sweetener, oil, milk, vanilla and mix. Add in the flour, cinnamon, baking powder and mix until combined.
Transfer mixture to the lined tray and bake for 25-30 minutes or until cooked. Let cool completely.
While the cake is cooking, add the cream cheese, butter and icing sugar to a food processor and blend until smooth. Leave in the fridge until the cake has cooled.
Add the cream cheese icing on to the cake. Slice into 9 pieces. Enjoy!