In a food processor, process the chocolate wafer cookies until crumbs form. Add the butter and sugar and continue to pulse until moistened.
Press the chocolate cookie mixture into the bottom and up the sides of a 9-inch pie plate (you really want to build up the sides so they become a well when you pour the ice cream into the crust). A straight-sided dry measuring cup to help you get the inside edges smooth. Bake until dry, about 10 to 12 minutes. Let cool completely.
Spread the ice cream mixture evenly over the cooled crust, making the top smooth. Freeze for one hour. Make sure pie plate is on a completely flat surface in the freezer.
To make the topping, place heavy cream in a small saucepan over medium-high heat and heat to very warm (buubly), about 1 minute. Add 2 oz of chocolate chips and stir until mixture is very smooth. Drizzle over the partially frozen ice cream cake. Sprinkle with crushed espresso beans and mini chocolate chips. Cover and freeze until firm another 6 hours or overnight.
Notes
Before serving, remove the pie from freezer and let rest for 10 minutes.