Add the coffee, hazelnut milk and hazelnut syrup to a Creami tub and stir to combine. Cover and transfer to the freezer for 24 hours, or until frozen through.
When ready to serve, pour 100ml (3⅓fl oz/⅓ cup + 1 tbsp) hazelnut milk into the tub and churn on FULL, FRAPPÉ in your Creami.
Serve in glasses, topped with a spoonful of coconut double cr