I can't tell you WnM recipe, but, I've got a pretty solid one that gets good reviews from people.
3/4c Buttermilk
1/2 clove garlic
1 Heaping Tablespoon Semi-soft blue cheese. I like Maytag, but, Dutch and Gorgonzola work well too
Put all 3 in a measuring cup and hit with an immersion blender until smooth. A Magic bullet or mini-prep food processor would work just as well.
In a separate bowl, add in 1 cup of Dukes or Hellman's, 1 tsp each salt, pepper, and lemon juice plus 1/2tsp dill. Pour in the buttermilk mix and whisk to combine. Fold in additional blue cheese crumbles as much as you like.