Make according to layer.
1st Layer: 1 1/2 cup flour, 1 1/2 stick margarine. Mix together until crumbly and put into cake pan. Bake @ 350 degrees for 45 minutes. Cool completely.
2nd Layer: 8 oz. cream cheese 1 cup powder sugar 8 oz. cool whip Mix cream cheese and powdered sugar until creamy. Add cool whip.
3rd Layer: 2 small boxes instant vanilla pudding mix, 1 1/2 C. milk, 1 15 oz can pumpkin. Mix well, and spread onto of 2nd layer.
4th Layer: 8 oz. cool whip, 1 1/2 tsp. pumpkin pie spice. Mix together and put on top of 3rd layer. Store in refrigerator.