FOR FIRST LAYER, combine:
1 cup flour
1/2 cup melted margarine
1/2 cup chopped pecans
pat into a 9″x13″ pan. bake at 350° for 15 minutes. cool.

FOR SECOND LAYER, combine:
1 (8 oz) pkg softened cream cheese
1 cup 10x sugar
1 cup cool whip
spread on top of first layer, then chill.

FOR THIRD LAYER, combine:
2 pkgs instant pudding mix (chocolate, vanilla or butterscotch)
3 cups milk
1 tsp vanilla
mix together & beat until thickened. pour on top of second layer. chill.

FOR FOURTH LAYER, spread surface with cool whip. sprinkle with chopped pecans (optional). chill & serve.