1st Layer
2 cups flour
11 Tbs. margarine
1 1/2 cups chopped pecans

Mix together and press into a 13"x9"x2" pan.  Bake at 350 degrees for about 20 minutes.  Cool completely.
 
 

2nd Layer
8 oz. cream cheese
1 cup confectionery sugar
1 tsp. vanilla
1/2 large container of Cool Whip

Beat together all ingredients and spread on first layer.
 
 

3rd Layer
2 small packages instant chocolate pudding
3 cups milk

Mix and spread over 2nd layer
 
 

4th Layer
Remaining Cool Whip

Spread over 3rd layer.