Grasshoper Pie

1 pkg Oreos
1/4 c. unsalted butter, melted
1 jar marshmallow cream
1 container cool whip
1/4 c. milk
1/2 tsp peppermint extract
green food coloring

Grind Oreos in food processor until fine. (Save some crushed Oreos to sprinkle on top.) Stir in butter and press into a pie pan. In bowl, fold together marshmallow cream, cool whip, milk, and extract. (You can microwave marshmallow cream for a few seconds so it's easier to work with.) Add a few drops of food coloring until desired color. Put mixture on top of Oreo crust. Sprinkle with Oreo topping. Freeze until ready to serve.