In a mixer bowl, blend the sour cream, mustard, Worcestershire Sauce, salt, pepper, and garlic powder for 2 minutes at low speed.
Add the mayonnaise. Blend for 1/2 minute at low speed and 2 minutes at medium speed.
Using your hand, crumble the cheese into the mixture. Blend at low speed for no longer than 4 minutes. For a chunky salad dressing, reserve some of the blue cheese crumbles to stir in after blending.
Refrigerate for 24 hours before using.
Video
Recipe Tips
For chunky salad dressing, reserve some of the blue cheese crumbles to stir in after blending.