Crush Cookies: Place all Oreo cookies into a food processor and pulse until fine crumbs form. If you don't have a food processor, simply put them in a sealed plastic bag and crush them thoroughly with a rolling pin. Set aside about 2 tablespoons of crumbs for decorating your truffles later.
Combine & Mix: In a medium-sized mixing bowl, add the softened cream cheese to the crushed Oreo crumbs. Mix everything together with a rubber spatula or a hand mixer until the texture is smooth and dough-like, and the mixture holds together easily.
Roll & Chill: Line a baking sheet with parchment paper. Take small portions of the mixture and gently roll them into uniform 1-inch balls. Arrange these balls on the prepared baking sheet. Once all the truffles are shaped, place the tray into the refrigerator or freezer for about 30-45 minutes until they become firm. This step is key for easy dipping!
Melt Chocolate: In separate microwave-safe bowls, carefully melt the white chocolate and the milk or semisweet chocolate. Heat them in 20-second intervals, stirring well after each, until both are smooth and completely melted. Alternatively, you can melt the chocolate using a double boiler on low heat.
Dip & Decorate: Using a fork or a special dipping tool, carefully dip each firm truffle into your chosen melted chocolate, ensuring it's fully coated. Gently tap off any excess chocolate and return the truffle to the parchment paper. While the chocolate coating is still soft, quickly sprinkle with your chosen toppings like festive sprinkles, crushed candy canes, or a light drizzle of contrasting chocolate for an elegant finish.
Final Chill: Return the decorated truffles to the refrigerator for another 15-20 minutes, allowing the chocolate coating to fully harden. Once set, your delightful truffles are ready to enjoy or store!