MICROWAVE 1 cup morsels and 1/3 cup evaporated milk in medium, uncovered, microwave-safe bowl on HIGH (100%) power for 45 seconds; stir until smooth. Stir in butter; pour into crust. Refrigerate for 20 minutes or until cool to the touch.
MEANWHILE, BEAT remaining evaporated milk, pudding mix, water, peppermint extract and 3 drops food coloring in medium bowl until combined. Gently stir in 2 cups whipped topping and additional drop of food coloring, if desired. Spoon over chocolate layer.
REFRIGERATE for 2 hours or until set. Sprinkle with additional morsels. Spoon remaining whipped topping in center of pie. Garnish with fresh mint.