Do not enter this discussion lightly. This is the stuff that sucks the unwary under like South American quick sand. There is no mercy in this marmalade.
The manufacturer, McVities, had always categorised them as cakes and to boost their revenue the tax authorities wanted them recategorised as biscuits. A legal case was fought in front of a brilliant adjudicator, Mr D C Potter.Well, I had never even heard of Jaffa Cake until this moment and all I can say is blub-blub-blub. Perhaps you can save me ... and yourself as well.