24 Oreo cookies, crushed
1/4 c. butter, melted
1/4 c. creme de menthe
1 (7 oz.) jar marshmallow creme
2 c. heavy cream, whipped

Combine crumbs and butter. Press into a 9" pie plate reserving 1/2 cup for topping. Gradually add creme de menthe to marshmallow creme. Mix well. Fold in whipped cream. Pour into shell and top with crumbs. Freeze until ready to serve.