Prepare a large cookie sheet with parchment paper and set aside.
Using the food processor, finely crush the Oreos.
In a large mixing bowl, combine crushed cookies, peppermint extract, vanilla, and cream cheese. Blend using an electric hand mixer for 2-3 minutes or until well blended and smooth. This mixture should be dough-like.
Using a 2 tablespoon cookie scoop, scoop cookie mixture and release into your hands. Roll into a small ball using the palms of your hands before placing it back on the baking sheet. Repeat until the dough is gone or baking sheet is filled (I like to fit 12-15 balls on a 11x17 inch sheet).
Place each truffle ball on the sheet of parchment paper and place inside the refrigerator for 1.5 hours to chill.
About 5-10 minutes before the chilling time is complete, begin to prepare your melting chocolate. Add wafers to a microwave safe bowl. Microwave on 50% power for 1 minute. Add Crisco and stir. Continue heating in 30 second bursts, stirring in between, until fully melted and silky smooth.
Using two forks or dipping tools, dip each truffle ball into the melted chocolate, covering it completely. Roll the ball, working it into the chocolate to cover it completely.
Place the chocolate covered ball back on the baking sheet and immediately top with crushed candy canes.
Allow Oreo balls to chill for 30 minutes before serving.