In a medium bowl, combine the crushed chocolate sandwich cookies and set aside.
In another bowl, mix the vanilla pudding and whipped topping until well combined and smooth.
In serving cups or bowls, layer the ingredients starting with a layer of the cookie mixture, followed by a layer of the pudding mixture.
Add a layer of diced strawberries and blueberries on top of the pudding.
Repeat the layers until the cups are filled, finishing with a layer of whipped topping and a sprinkle of crushed cookies on top.
Garnish with fresh mint leaves if desired.
Refrigerate for at least 30 minutes before serving to allow the flavors to meld.