Preheat oven to 200oC/fan 180oC/gas mark 6.
Melt 2 bars of Vitabite in a heatproof bowl over a pan of boiling water.
Spoon the melted Vitabite onto a baking tray lined with baking paper to make oval shapes (2cm wide).
Chill in the fridge until set.
Make the Fate low protein chocolate flavour cake mix as per packet instructions and divide equally between 6 cupcake cases.
Bake in the oven for 20 mins then remove and allow to cool.
Meanwhile, make the icing. Melt remaining Vitabite in a heatproof bowl over a pan of boiling water then allow to cool to room temperature.
Put the butter and icing sugar into a bowl and beat until smooth.
Fold in the cooled melted Vitabite until combined (you may need to add a small amount of ProZero to loosen)
Spread the icing over the top of the cupcakes.
Remove the Vitabite oval shapes from the fridge and place on the top of each cupcake, close to the edge.
Dip the top of the cupcake in a bowl of the mini marshmallows so that they stick to the icing to resemble sheep’s wool.
Stick the edible eyes to the oval Vitabite with a small amount of icing as glue.
ProZero, Fate low protein chocolate flavour cake mix and Vitabite are foods for special medical purposes and must be used under medical supervision.