Using a food processor, pulse the Oreos into fine crumbs.
Remove 1/4 cup of the crumbs and set aside.
Mix the cream cheese into the remaining crumbs. The mixture will be sticky. Roll the mixture into 1 inch balls, and place them onto a baking tray lined with parchment paper. Freeze the balls for 30 minutes.
Dip each ball in the melted chocolate, place back on the baking tray, and sprinkle with the reserved Oreo crumbs. Refrigerate until set.
Notes
Truffles can be kept in an airtight container, layered between parchment or wax paper, at room temperature or in the fridge for up to 1 week. They also freeze well for up to 2 months. Thaw overnight in the fridge.