Add the Oreos to the Thermomix bowl and crush 7 sec/speed 7 until they form fine crumbs.
Chop the cream cheese into quarters and add to the Thermomix bowl. Mix for 15 sec/reverse/speed 4 until combined.
Place the Thermomix bowl with the mixture in it in the fridge for 15 minutes. This will make the balls easier to roll.
Scoop the mixture out one heaped tablespoon at a time and roll into balls. Then, place on a baking tray lined with greaseproof paper. The balls I make are similar to walnut-size. (You might need to use two small baking trays depending on the size of your freezer.)
Place the balls in the freezer for 25 minutes. Freezing them makes it easier to dip them into the melted chocolate, and they don't fall apart.
Add the chocolate to the Thermomix bowl and grate for 5 sec/speed 10. Melt for 2-3 min/50℃/speed 2. Scrape down the bowl halfway through and check there's no unmelted chocolate stuck to the blades. When finished, pour the chocolate into a bowl.
Remove the balls from the freezer. Place one Oreo ball on a fork and spoon the melted chocolate over the top and sides of the ball. Gently lift the fork up and down to shake off any excess, then slide it back onto the baking tray to decorate. (See photos in the recipe post).
Once decorated, leave the balls to set at room temperature and store them in the fridge.
Heat the white chocolate in the microwave in bursts, occasionally stirring until melted. Transfer it to a small ziplock bag and cut a tiny hole in the bottom corner.
Drizzle over the chocolate balls in a zig-zag motion. Crush a couple of Oreos in the Thermomix or a zip-lock bag. Sprinkle over the Oreo balls just after they have been dipped in chocolate so they stick before the chocolate sets, then leave them to dry.
Notes
Oreo Cookies: The Oreo cookies I bought conveniently came in a packet of 39, which weighed 370g (see photo in recipe post).Storage: These Oreo Balls can be stored in an airtight container in the fridge for two weeks or in a freezer for three months.