Place oreos in a food processor and pulse until they are finely ground.
Add cream cheese and peppermint extract and pulse until mixed.
Roll mixture into 1 inch balls.
Freeze balls for at least 1 hour.
Meanwhile melt the chocolate. You can either melt it over a double broiler or in the microwave. If using the microwave, melt it in 15 second increments, stirring each time in between. It is important not to overheat the chocolate, Stop heating when it is just melted.
When oreo balls are chilled, dip them one at a time into the chocolate. Immediately sprinkle with the crushed peppermint before moving on to the next oreo ball.
When done, chill for at least 10 minutes before serving. Store in an airtight container in the refrigerator.