Preheat oven to 180oC

Line a loaf tin with baking paper

Whisk butter and caster sugar together in a mixing bowl until light and fluffy

Beat 2 eggs in a mug then add and whisk into butter mixture with a little of the flour

Mash 2 bananas in a mug

Fold in the remaining flour, baking powder and bananas to the butter mixture

Pour batter into lined loaf tin and bake for 25mins until skewer is removed clean

Remove from tin and allow to cool for 15mins

Make icing sugar topping and decorate banana loaf. Allow to set for 15mins