Place custard powder into a small jug or bowl.
Add 25ml ProZero and stir to make a smooth paste.
Pour the remaining ProZero into a small saucepan and place over a gentle heat until simmering.
Add custard paste and stir in well.
Stir constantly until the custard comes back to a simmer and is thickened.
Delicious poured over low protein desserts, fruit crumbles, apple pie or permitted fresh fruit.
Custard tastes great hot or cold.
ProZero is a food for special medical purposes and must only be used under medical supervision.