Break your cake into small pieces or crumble with your hands. Place crumbs in a large bowl and pour in the yoghurt. Mix with a spoon until a dough forms.

Roll into balls and put in the freezer for 30 minutes to harden.

Melt the white chocolate in a Bain Marie and in turn, dip the balls into the chocolate. Stand on a baking tray lined with grease-proof paper and sprinkle a little chopped nuts on each one, if you like. Place in the fridge to harden and then enjoy!