- Preheat oven to 180°C/fan 160°C/gas mark 5.
- Cream together the sugar and butter in a bowl.
- Add the Fate Low Protein All-Purpose Mix and baking powder and rub together with your hands until it resembles breadcrumbs.
- In a separate bowl, mix together the ProZero, egg replacer and vanilla essence.
- Add the ProZero mixture to the breadcrumb mixture and mix until well combined.
- Add in the food colouring until you achieve the colour you desire.
- Spoon the mixture evenly into the cupcake cases and bake in the centre of the for 25 minutes.
- Remove from the oven and allow to cool.
- In a bowl mix the food colouring into the icing and spoon into a piping bag.
- Ice the cupcakes and add the rainbow belts to form an arch.
- Add the Skittles around the base of the rainbow and serve.
Fate Low Protein All-Purpose Mix and ProZero are foods for special medical purposes and must be used under medical supervision.