1 c. cold milk
1 sm. pkg. instant chocolate pudding
3 1/2 c. (8 oz.) Cool Whip, thawed
20 crushed chocolate sandwich cookies
1 1/2 c. rocks (chocolate chips, peanut butter chips, chopped nuts or granola chunks)
1 graham cracker crust

Pour milk into a medium bowl. Add pudding mix and beat with mixer 2 minutes. Let stand 5 minutes. Fold in whipped topping, crushed cookies and the rocks. Spoon into pie crust. Sprinkle with remaining crushed cookies. Freeze until firm, about 4 hours.