Preheat oven to 180°C and line an 8×8 baking pan
Add the banana, eggs, sweetener, oil, milk, and vanilla to a bowl and mix
Add the flour, cinnamon, and baking powder to the wet ingredients and mix until combined
Transfer mixture to the lined tray and bake for 25-30 minutes or until cooked
Let the cake cool completely
While the cake is cooking, add the cream cheese, butter, and icing sugar to a food processor and blend until smooth
Leave the icing in the fridge until the cake has cooled
Add the cream cheese icing onto the cake
Slice into 9 pieces and enjoy
