Put the cranberries, Cointreau and orange zest in a pan, bring to a simmer and cook until softened and syrupy.
Leave to cool.
Chop or break 300g of the chocolate into small pieces and put into a heatproof bowl.
Place the cream and butter in a small saucepan, heat until just about to boil, pour over the chocolate and stir until melted.
If the chocolate doesn’t melt with the heat of the cream, place it over a saucepan of simmering water for a few minutes and stir until the chocolate melts.
Stir in the cranberries, leave to cool, then refridgerate for 4 hours or overnight.
With a small spoon or melon baller, scoop spoonfuls of the mix and roll into balls, then pop into the freezer for 30 mins.
Melt remaining chocolate in a bowl over simmering water.
Place each ball on a fork and dip into the melted chocolate, swirling until coated, place on a sheet of baking parchment and leave to set in the fridge.
Best served straight from the fridge.
Recipe by appetite magazine at https://www.appetitemag.co.uk/pass-the-ball-white-chocolate-and-cranberry-truffles/