In a mixing bowl, combine milk, buttermilk, mayonnaise, vinegar, Parmesan cheese, pepper, and garlic salt. Mix well with wire whisk. Fold in sour cream, leaving lumps intact. Refrigerate in a tightly closed container. Makes 6 cups.
Ingredients
1 1/4 c Milk
1 c Buttermilk
2 1/4 c Mayonnaise
1/4 c Cider vinegar
1/2 c Parmesan cheese , grated
1/4 ts Pepper
1 tb Garlic salt
1 1/2 c Sour cream