Prepare the crust by crushing the chocolate sandwich cookies into fine crumbs.
Combine cookie crumbs with melted butter and press into the bottom of a 9x13 inch dish.
In a separate bowl, beat together softened cream cheese and powdered sugar until smooth.
Fold in the whipped topping until fully incorporated into the cream cheese mixture.
Add the mint extract and blend well, then set aside.
In another bowl, whisk together milk and instant pistachio pudding mix until thickened, about 2 minutes.
Layer half of the cream cheese mixture over the cookie crust, followed by half of the pistachio pudding mixture.
Sprinkle half of the chocolate chips over this layer and then repeat the process with the remaining cream cheese and pudding mixtures.
Finish with a final layer of whipped topping on the top, garnish with green sprinkles.
Refrigerate for at least 4 hours or overnight before serving to allow the layers to set.