Crumble the cake properly using your fingers.
Add butter and mix well. Now take spoonful of crumble in hand and make balls using hand pressure.
Now melt chocolate in double boiler. Add little oil and mix it well.
Take a stick and dip into hot chocolate and carefully insert in a cake ball so that it won't break. Similarly do for the other balls. Keep them in refrigerator for half an hour.
Now melt the chocolate again and holding the stick dip each ball in chocolate and rotate slowly so that balls are covered with chocolate. Shake off gently side ways to remove extra coating of chocolates.
Immediately, decorate with colorful sugar balls. Keep them in refrigerator for another half an hour.
Later takeout and serve.
