Pulse the cookies and nuts in a blender until you have a fine crumb.
Add the melted butter and pulse again to blend.
Press the crumb mixture into the bottom of a 13x9-inch cake pan in an even layer.
Mix 1½ cups of the Cool Whip with the powdered sugar and cream cheese, beating until smooth.
Spoon this over the crust.
Whisk the instant pudding mix into the milk until smooth and thick.
Add this on top of the cream cheese layer.
Arrange a layer of strawberries on top of that, keeping some aside for a garnish.
Cover the dessert with the remaining Cool Whip.
Chop the rest of the strawberries and sprinkle them on top, along with some cookie crumbs if liked.