3/4 cup Sour Cream
1/2 teaspoon Dry Mustard
1/2 teaspoon Black Pepper
1/2 teaspoon Salt (Scant)
1/3 teaspoon Garlic Powder
1 teaspoon Worcestershire Sauce
1 1/2 cups Mayonnaise
4 ounces Danish blue cheese crumbled

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.