In a medium bowl, mix chocolate cookie crumbs and melted butter until combined. Press firmly into a 9-inch pie plate. Chill while preparing the filling.
In a large bowl, beat cream cheese and sugar until smooth and creamy.
Add peppermint extract and food coloring (if using), and mix well.
Fold in whipped topping and 3/4 cup mini chocolate chips until evenly combined.
Spread the filling into the prepared crust and smooth the top.
Sprinkle remaining chocolate chips over the top. Drizzle with chocolate syrup if desired.
Refrigerate for at least 4 hours or until firm. Slice and serve chilled.