01 - Line a baking sheet with parchment paper.
02 - Place Oreo cookies in a food processor and pulse until fine crumbs are achieved.
03 - Add softened cream cheese and vanilla extract to the Oreo crumbs. Pulse until thoroughly integrated into a thick dough.
04 - Scoop tablespoon-sized portions and roll into uniform balls. Arrange on the parchment-lined baking sheet.
05 - Chill the formed balls in the freezer for 20 to 30 minutes, until firmed.
06 - Melt chocolate in a heatproof bowl set over a pan of simmering water or microwave in 30-second increments, stirring until smooth.
07 - Using forks, coat each chilled truffle ball in melted chocolate, allowing excess to drip off before returning to the sheet.
08 - Before the chocolate sets, affix two candy eyes to each truffle.
09 - Break pretzel sticks in half. Insert four halves on each side of each truffle to form spider legs.
10 - Garnish with sprinkles or colored sugar as desired.
11 - Chill truffles in the refrigerator for at least 30 minutes, until chocolate has set. Serve chilled or at room temperature.