FIRST LAYER: Blend 1 cube butter, 1 cup flour, and 1/2 cup nuts. Pat into 9 x 13 pan. Bake 15 minutes at 350 degrees.
SECOND LAYER: Blend 1 cup powdered sugar, 1 cup Cool Whip and 8 ounce package cream cheese and spread over crust.
THIRD LAYER: Mix 2 packages vanilla instant pudding. Spread over second layer and let stand for 3 hours in refrigerator.
FOURTH LAYER: Put remaining Cool Whip on top and sprinkle with 1 cup nuts. (This dessert freezes beautifully and can be made in advance.)