Line a baking tray with baking paper and set aside.
Crumble the cake well in a bowl without any lumps.
Add just enough cream, icing sugar, vanilla and salt to bring the mixture together. It should just hold shape, it shouldn't be too sticky.
Roll into small balls and set aside.
Melt the chocolate and coconut oil in a microwave for a minute. Give it a stir till smooth.
Dunk each of the truffles, roll in the chocolate mix and place onto the tray. Keep a small spacing among each.
Keep in the fridge and allow it to cool.