Step 1

In a medium bowl, whisk the buttermilk, mayonnaise, sour cream, apple cider vinegar, garlic, salt, and pepper. Make sure your blue cheese is crumbled into small pieces. Add to the mixture along with the chives and stir to combine. To incorporate some of the blue cheese crumbles more thoroughly, use the back of a spoon to mash them against the sides of the bowl, and then stir again. (Alternatively, if you want the dressing completely smooth, blend all of the ingredients except for the chives in a food processor, then stir in the chives.)

Step 2

Make-Ahead Instructions: The dressing will keep nicely in a covered container in the refrigerator for up to a week.

Step 3

Note: If you don't have buttermilk (or don't want to buy a whole carton), use sour cream or yogurt (Greek or regular) thinned with milk to a thick but pourable consistency.