01 - Preheat oven to 350°F. In a medium bowl, mix chocolate cookie crumbs with melted butter until evenly coated. Press firmly into the bottom and up the sides of a 9-inch pie dish.
02 - Bake crust for 8-10 minutes. Let cool completely.
03 - In a large bowl, whisk instant pudding mix with cold milk and peppermint extract until thickened, about 2 minutes.
04 - Add a few drops of green food coloring to achieve desired shade, mixing well.
05 - In a separate bowl, whip heavy cream with powdered sugar and vanilla extract to stiff peaks.
06 - Fold half of the whipped cream into the green pudding mixture until smooth.
07 - Spread the filling into the cooled crust.
08 - Top with remaining whipped cream, swirling gently with a spatula to create a marbled effect.
09 - Refrigerate at least 2 hours, or until set.
10 - Garnish with chocolate shavings and fresh mint leaves before serving, if desired.