Step 1

Mix together mayonnaise, milk, sour cream, worcestershire sauce, 1/3 cup blue cheese, and half vinegar, salt and pepper in blender.

Step 2

Taste for acidity and add more vinegar as necessary.

Step 3

Add in remaining blue cheese for a chunky dressing. You can choose to add all blue cheese to the blender if you want your dressing completely smooth.

Step 4

Taste, as some blue cheese is stronger than others and you may need to add more.

Step 5

Refrigerate at least four hours, ideally overnight.