My sister in law came up with the idea of heating up shop bought ginger cakes and serving them with custard. Very nice, but we use ginger cakes as offerings for deities, spirits and rituals. We make an offering at important times or when rituals have been done. When the deity or spirit has taken the energy form the produce, then the birds and foxes eat the rest, so it all goes to a good cause. it is a way of supporting the faith and the religion, a bit like the way people put money on the church collection plate.