Line a baking sheet with parchment paper.
Place 36 classic Oreos cookies in the bowl of a food processor and pulse into a fine crumb.
Add 8 ounces cream cheese and blend until combined.
Using a small cookie scoop, place mounds of dough the size of a walnut onto the prepared baking sheet so the truffles don’t stick to the pan. Repeat with the rest of the dough.
Place the sheet in the freezer for 15-20 minutes or refrigerate for 1 or 2 hours, or until the mixture is firm enough to handle. Cover well to avoid dryness if storing for a longer period (up to 2 days).
With the palms of your hands, roll into smooth balls. Freezer for 1o minutes to firm up. If you need more time, cover well and refrigerate up to 2 days.
Melt 12 ounces semisweet melting or candy chocolate In the microwave or in a double boiler (see Notes below).
Place an Oreo ball on a fork (or use a wooden skewer like wwe do with the buckeyes) and dip it into the melted chocolate. Let any excess chocolate drip and swipe against the rim of the bowl.
Place back onto the baking sheet and repeat until all the truffles are covered in chocolate.
If you want to, top with sprinkles, finely chopped nuts or crumbled Oreos before the chocolate hardens.
Allow chocolate to dry in the fridge for about 45 minutes before eating.