Sour Cream Dressing1 Servings. (like Hidden Valley)Ingredients2 cups mayonnaise (not salad dressing)2 cups buttermilk1 teaspoon parsley flakes1/2 teaspoon celery salt1/2 teaspoon onion salt1/2 teaspoon garlic saltDirectionsShake well in jar or beat, but do not put in blender.May use as a chip dip or on baked potatoes or as a salad dressing.Category: Salads and Dressings