Pistachio Dessert

First Layer:
1 cup flour
1/2 cup soft butter or margarine
1/2 cup chopped walnuts or pecans
 
Mix all together and press in bottom of pan and flatten.  Bake at 350 for 20 minutes or until light brown.  Cool in fridge.
 
Second Layer:
1 8 oz cream cheese
1 cup powdered sugar
1 small tub of cool whip (save 1 cup for the top of dessert)
 
Whip cream cheese and powdered sugar together than add cool whip then spread on cooled first layer.  Cool in fridge.
 
Third Layer:
2 small pkgs. of instant pistachio pudding (or your choice of flavor)
3 cups milk
1 tsp. vanilla
 
Beat until pudding consistency.  Spread on second layer, cool.
 
Fourth Layer:
Spread on one cup cool whip.  Chill until cold throughout.