Crush the Oreo cookies in a food processor until finely crushed. Alternatively, place the cookies in a large zip-top bag and crush them with a rolling pin.

In a large bowl, combine the crushed Oreos, softened cream cheese, and peppermint extract (if using). Mix well until everything is evenly combined.

Add green food coloring gel, a few drops at a time, until you reach your desired shade of Grinch-y green. Be careful not to add too much liquid.

Roll the mixture into 1-inch balls and place them on a baking sheet lined with parchment paper or a silicone mat.

Place the baking sheet in the freezer for at least 30 minutes to firm up the truffles.

While the truffles are chilling, melt the white chocolate chips (or melting wafers) in a double boiler or microwave-safe bowl. If using a microwave, heat in 30-second intervals, stirring in between, until melted and smooth. Stir in the coconut oil (if using) for an extra smooth consistency.

Remove the truffle balls from the freezer.

Using a fork or dipping tools, dip each truffle ball into the melted white chocolate, ensuring it is fully coated. Gently tap off any excess chocolate.

Place the dipped truffles back on the prepared baking sheet.

Immediately sprinkle with red heart sprinkles and green sanding sugar (if using) before the chocolate sets.

Place the baking sheet in the refrigerator for at least 15-20 minutes to allow the chocolate to fully set.

Once the chocolate is set, you can transfer the truffles to a serving plate or store them in an airtight container in the refrigerator.