First, make sure that your melted chocolate is warm. On the other hand, your oreo balls have to be fully chilled before dipping in the chocolate. If not frozen, the cookie balls will fall apart in the warm chocolate. Drop each frozen ball in the chocolate and spoon the chocolate over the top. Then, carefully lift out with a bamboo skewer or fork. Using a toothpick, slide the cookie ball off the fork and onto the wax paper. Roll in crushed peppermint candies and let it set.