Preheat oven to 180°C/fan 160°C/gas mark 5.
Cream together the sugar and margarine in a bowl.
Add the Fate low protein all-purpose and the 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 dry mixture and mix until well combined.
Pour into a lined 8cm cake tin and bake in the oven for 15 minutes.
Serve with low protein custard or ice ‘cream’!
Fate Low Protein All-Purpose Mix and ProZero are foods for special medical purposes and must be used under medical supervision.