This is along the lines of the thicker style blue cheese dressing, also known as Roquefort. Perfect for chunky vegetable salads, for dipping things in, or as the perfect dressing for the infamous “wedge” salad. It’s also great on baked potatoes. I like to use red wine vinegar, even though it tinges the dressing faintly pink. If you want pristine whiteness, just use white wine vinegar in lieu of red wine vinegar. Make this dressing whenever you have buttermilk on hand, because let’s face it, nothing uses a full quart of buttermilk (and it seems you can only get it in quarts nowadays). There is no salt added in this recipe as mayo and blue cheese both tend to be salty.