Place 20 chocolate cookies in a food processor and blend until they are crushed into tiny pieces. (You can also put them in a bag and hit them or roll a rolling pin over them until they are crushed).
Mix 1/4 cup of melted vegan butter (or coconut oil) with the crushed sandwich cookies and then press the mixture to the bottom of a 9-inch springform pan or pie dish.
Place in the refrigerator to cool while you make the filling.
Make the mint pie filling:
Pour 3/4 cup of aquafaba and 1/4 tsp of cream of tartar in a mixing bowl.
Mix with an electric mixer for 7 minutes, stopping occasionally to scrape the edges.
Add 1 cup of powdered sugar a small amount at a time to the whipped aquafaba while mixing for another 2 minutes.
After the aquafaba has been beaten for a total of 9 minutes, set the bowl of whipped aquafaba aside.
Mix 2 cups of vegan cream cheese with 1/3 cup of creme de Menthe, and 1/3 cup of melted refined coconut oil in a separate bowl with an electric mixer.
Slowly add 2 cups of powdered sugar to the cream cheese mixture 1/2 cup at a time beating again between each one.
Pour the cream cheese mixture into the aqufaba mixture, sprinkle with chocolate chips or cookie crumbs and fold the mixture together with a spatula. Be careful not to over stir or it will start to deflate. Just stir enough so that everything is incorporated.
Pour the filling into the pie cruts and smooth it out. (Top with some extra chocolate chips or cookie crumbs if you want).
Freeze overnight or for at least 6 hours. Serve frozen.
Make sure to beat the aquafaba for a total of 9 minutes. It will look like whipped cream after about 5 minutes, but the protein bond will not be strong enough to hold the air in the pie until it whips for a total of 9 minutes. You can do more, but don't do less.
Use a pre-made chocolate graham cracker crust if you want to make it easier.
You will need a large sharp knife to cut through the frozen pie crust. Push down firmly to cut through it when slicing.
If you don't want to use alcohol, you can omit the Creme de Menthe and use 1 tsp of peppermint extract instead.