3/4 cup sour cream
1/2 teaspoon mustard powder
1/2 teaspoon black pepper
1/2 teaspoon salt
1/3 teaspoon garlic powder
1 teaspoon worcestershire sauce
1-1/3 cups mayonnaise
4 ounces bleu cheese, crumbled
In a mixing bowl, blend sour cream, mustard, pepper, salt, garlic powder and worcestershire for 2 minutes at low speed. Add mayonnaise. Blend 30 seconds at low speed to incorporate and then 2 minutes at medium speed. By hand crumble cheese into mixture. Blend at low speed no more than 4 minutes.
Refrigerate 24 hours before use.