01 - Line the bottom of a 9-inch springform pan with parchment paper.
02 - Combine crushed chocolate sandwich cookies and melted butter in a medium bowl. Mix until crumbs are evenly coated.
03 - Press the mixture firmly into the bottom of the prepared pan to create an even crust. Freeze for 20 minutes.
04 - Allow the mint chocolate chip ice cream to soften at room temperature for 10 to 15 minutes.
05 - Spread the softened ice cream evenly over the chilled crust, smoothing the top with a spatula. Freeze for at least 4 hours until firm.
06 - Heat heavy cream in a small saucepan over medium heat until just simmering. Remove from heat and add chocolate chips and butter. Let sit for 2 minutes, then stir until smooth and glossy. Cool for 10 to 15 minutes.
07 - Pour the cooled ganache over the frozen ice cream layer, spreading evenly. Freeze for at least 2 more hours until set.
08 - Garnish with mini chocolate chips and fresh mint leaves if desired. To slice, run a knife under hot water and dry before cutting.