3/4 c. milk
3/4 c. mayonnaise
1/2 c. sour cream
1/4 c. buttermilk
4 1/2 tsp. cider vinegar
1 1/2 tsp. garlic salt
1/2 tsp. pepper
2 tbsp. freshly grated Parmesan cheese

Combine milk, mayonnaise, sour cream and buttermilk; whisk ingredients until thoroughly blended. Place vinegar in cup, stir in garlic salt and pepper; add to mayonnaise mixture. Blend in cheese. Store in refrigerator.

Blue cheese may be substituted for Parmesan.