1. Melt butter.
2. Add half a tin of condensed milk (about 200g), 1tsp vanilla and mix.
3. Crush 1pkt of Marie biscuits into crumbs and add to the butter mixture.
4. Mix well.
5. Cut 7 marshmallows in half - (kitchen scissors work well to cut).
6. Wet your hands before taking half a marshmallow and forming a ball of Marie mixture around it. (Wet hands stop the mixture from sticking too much to your hands.)
7. Roll the ball in coconut.
8. Place on a plate in the fridge for an hour to harden before serving.