Place the Oreos into the Thermomix bowl and mix for 8 seconds, Speed 8, or until they resemble fine crumbs (set aside 2 tbs of crumbs to sprinkle on top).
Add the softened cream cheese and mix for 10 seconds, Speed 4. Scrape down the sides of the bowl and repeat until well combined (scraping down the sides of the bowl occasionally).
Place the mixture into the freezer for 30 minutes.
Roll into 1 inch sized balls and place on a tray lined with baking paper.
Place the mixture back into the freezer for a further 30 minutes.
Place the chocolate into a clean Thermomix bowl and grate for 6 seconds, Speed 6. Melt for 3 minutes, 50 degrees, Speed 2.
Pour the melted chocolate into a small bowl.
Place the truffles into the bowl of melted chocolate (in batches) and use two forks to roll the truffles around until they are completely coated.
Remove truffles with the forks and allow any excess chocolate to drip off.
Place back onto the baking paper lined tray and decorate with the reserved Oreo crumbs.
Place into the fridge to set.