Remove the mint ice cream from the freezer and let it soften for at least 10 minutes so it's spreadable.
While the ice cream softens, place the mint Oreo cookies in a resealable plastic bag and crush them with a rolling pin; set aside for topping.
Press the chocolate cookie crust into a 9-inch pie dish or springform pan if not already prepared.
Spoon the softened mint ice cream into the chocolate crust and smooth the top with a spatula.
Spread 2 cups of whipped cream evenly over the ice cream.
Sprinkle the crushed mint Oreos and chocolate shavings (or crushed Andes mints) over the whipped cream.
Freeze the pie for at least 2 hours until firm.
Remove the pie from the freezer 15 minutes before serving to soften slightly for easier slicing.
For clean slices, dip a sharp knife in hot water, wipe the blade dry between cuts, and reheat as needed.