There are 4 layers to this recipe. Use an 8 x 12 inch baking dish. 1ST Layer: Mix together the following ingredients: 1 cup flour, 1 cube soft margarine and 1 cup walnuts. Press in bottom of dish to make crust. Bake at 350 degrees for 15 minutes. Cool completely. 2ND Layer: Cream cheese, powdered sugar and 1 cup Cool Whip. Mix together and spread over the crust. 3RD Layer: Mix pistachio instant pudding mix with 3 cups of milk and spread over 2nd layer. 4TH Layer: Spread remaining Cool Whip on top and sprinkle with fine chopped nuts. 12 servings.