Mix together pecans, melted butter, and flour. Pat into the bottom and up the sides of a 9 inch pie plate. Bake at 350 degrees F (175 degrees C) until lightly browned. Remove from oven, and set aside to cool.
In a mixing bowl, blend 1 cup whipped topping, cream cheese, and confectioners sugar until creamy. Spread into cooled crust.
Whisk together pudding mix and milk. Spread evenly over cheese layer, and the spread remaining whipped topping on top. Chill 1 1/2 to 2 hours.