Prep pan. Line a small baking sheet with parchment paper or wax paper.
Make Oreo mixture. Place Mint oreo cookies in the food processor (or you can do this in a blender, or stand mixer, or in a ziploc bag and crush with a rolling pin) and pulse into fine crumbs. (If you can't find mint oreos, use regular oreos and add 1 teaspoon peppermint extract now). Add cream cheese and pulse until smooth. If doing this by hand, I transfer the crumbs to a mixing bowl and then use a hand mixer to mix in the cream cheese.
Scoop into balls. Using a 1-inch cookie scoop, scoop cookie mixture and roll into balls using your hands. Place onto the baking sheet. Freeze for 15 minutes.
Make chocolate coating. In a small bowl, microwave chocolate for 30 seconds.. Stir and microwave again for another 30 seconds. Repeat in 15-second intervals, stirring after each addition, until fully melted. You could also melt the chocolate in a double boiler.
Dip Oreo balls. Remove Oreo cookie balls from the freezer. Using a fork, lower dip a truffle, into the chocolate coating. Shake excess from the truffle and place onto the baking sheet. Sprinkle on crushed candy canes immediately before the chocolate sets. Repeat with remaining truffles. Refrigerate until firm.