Creamy Potato Salad Dressing
["2 c. mayonnaise (2/3 Hellmann's and 1/3 Miracle Whip)", "8 oz. carton sour cream", "1/4 c. vinegar", "1/2 c. sugar", "2 tsp. regular salt", "1 tsp. seasoned salt", "1 Tbsp. prepared mustard (not dry)", "pepper, onions and celery to taste", "5 lb. potatoes"]
["Mix with wire whip."]
["mayonnaise", "sour cream", "vinegar", "sugar", "regular salt", "salt", "pepper", "potatoes"]