Rare Diseases Day Cake

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 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 dry mixture and mix until well combined.

Separate the mixture evenly into 4 bowls.

Add 3 drops of red food colouring to the first bowl and stir, add more red food colouring until you achieve the desired colour.

Repeat step 7, adding a different colour Dr Oetker Gel Food Colour to each bowl of cake mixture.

Pour a different bowl of mixture into each corner of a lined 8cm cake tin.

Move a knife gently through the mixture to swirl the colours together and bake in the oven for 25 minutes or until a knife can be inserted and comes out clean.

When the cake is cool, mix together the icing sugar and water and pour over the cake.