1/2 pound blue cheese (1 cup packed)
1/2 cup buttermilk
1/2 cup mayonnaise
1/4 cup sour cream
1 tablespoon red wine vinegar
1 teaspoon dry mustard
In a bowl, break blue cheese into 1/2-inch chunks. Add buttermilk, mayonnaise, sour cream, red wine vinegar, and dry mustard; stir until blended. If making up to 4 days ahead, cover and chill; stir before using.
Nutritional analysis per tablespoon.