Preheat oven to 160oC.

Grease and line either a loaf pan or a round cake tin.

Beat the butter and 225gm of castor sugar together until light and fluffy. The more attention you pay to this stage the lighter your cake will be.

Add the eggs one at a time, beating thoroughly after each one so that the mixture doesn't curdle.

Add the zest of the blood oranges.

Add the vanilla bean paste.

Mix together well.

Sift the self raising flour into the butter-sugar mixture.

Put the mixture into the prepared tin and smooth.

Bake 45-50 minutes or until a skewer inserted in the middle comes out clean.

A.llow to cool slightly

Mix the remaining 85gm castor sugar with the juice of 1.5 blood oranges.

Make holes in the cake with a skewer and gradually pour the syrup over the top of the cake until it is all absorbed.

Dust lightly with icing sugar for a beautiful finish.  Slice and enjoy!