Put the soft butter in a medium bowl and gradually beat in the icing sugar until smooth.
With an electric whisk, beat in the Hazelnut Chocolate Spread followed by the melted chocolate.
Finally whisk in the cream until fluffy and light. Use straight away or keep the frosting covered in the fridge for up to one week.
The frosting will be firm straight from the fridge so leave at room temperature to soften for an hour before using, or microwave for just a few seconds. The frosting also freezes.
