In a small bowl, combine the blue cheese, buttermilk, yogurt, vinegar and Worcestershire sauce until smooth, mashing the blue cheese with a fork to break it apart.
Season with salt and pepper to taste.
Refrigerator in an airtight container until ready to serve.
Video
Notes
Dressing is ready to serve immediately, however, I like to make it a few hours in advance and chill. This gives the flavors a chance to develop.