How to make
Melt the crushed chocolate with butter in a water bath. Then add the chopped or ground in a blender or food processor biscuits.
Mix successively with the walnuts, oil, milk, vanilla and blend it all well. Shape the mixture into small balls the size of a walnut. Roll them in chocolate sprinkles, coconut flakes or chopped nuts of your choice.
Let the chocolate balls sit in the fridge for at least 2-3 hours.