Heat oven to 350°. In a medium bowl, combine crumbs and melted butter; blend well. Press firmly into bottom and sides of a 9-inch pie pan. Bake for eight to 10 minutes; cool.
In a medium saucepan, combine milk and marshmallows over low heat. Melt marshmallows, stirring constantly. Stir in creme de menthe and creme de cacao. Chill until thickened but not set. Fold in whipped cream or whipped topping.
Pour into cooled crust. Refrigerate for three hours or until set. Garnish with chocolate curls if desired.