Sauces Roquefort Dressing version 1 quick 2 cups mayonnaise 1 1/2 cup buttermilk 8 ounces Roquefort cheese, crumbled 2 tablespoons Worcestershire sauce 1 teaspoon garlic powder In a blender or food processor, combine mayonnaise, buttermilk, cheese, Worcestershire and garlic powder, and process until smooth. Store in tightly covered jar in the refrigerator until ready to serve. 1.5 Cups.