Preheat your oven to 160°C and line a 24 x 18cm baking dish with greaseproof paper.

Place the chocolate and butter in a large microwave safe bowl. Microwave for 30 seconds, stir, then repeat until the chocolate has completely melted.

Whisk the mashed banana into the chocolate mixture, then whisk in the eggs.

Add the sugar and salt, then sift in the flour and baking powder. Whisk until smooth.

Pour the brownie batter into the prepared baking dish, then sprinkle the XO Crunch in an even layer over the batter.

Place in the centre of your oven and bake for 35-40 minutes. The brownie should be cooked around the edges but still a little soft in the middle.

Allow to cool in the baking dish for 15-20 minutes, then transfer to a wire rack to cool completely.

Transfer to the fridge and chill before cutting to get clean slices. Cut into 12 pieces and dust with icing sugar before serving.