Mom's Recipe Box

1 pkg (4 serving size) Jello Pistachio instant pudding 1 can crushed pineapple in juice, undrained 1 cup mini marshmallows 1/2 cup chopped pecans 1 1/2 cups Cool Whip Mix pudding, pineapple, marshmallows and pecans in large bowl until well blended. Stir in cool whip. Cover - refrigerate 1 hour