In a small mixing bowl, whisk together all ingredients, except water and cheese, until well blended; whisk in enough water to reach desired consistency. Fold in cheese and additional water, if needed. Serve immediately or store, covered, in the refrigerator for up to 3 days.
Note: 1-2 tbsp. fresh buttermilk can be substituted for the buttermilk powder and water.
You may enjoy this basic recipe for Creamy Salad Dressing: