Banana & walnut slice Recipe | New Idea

Ingredients

• 1 cup plain flour
• 1 cup self-raising flour
• 1 ½ cups brown sugar, firmly packed
• 125 g cold unsalted butter, finely chopped
• ½ cup milk
• 1 cup mashed banana
• 1 egg, lightly beaten
• 1 tsp bicarbonate of soda
• ½ cup roughly chopped walnuts
• icing sugar mixture, to decorate
• Thick cream or vanilla yoghurt, to serve