Place sour cream, spices, and Worcestershire sauce in mixing bowl. Blend for two minutes at low speed.
Add mayonnaise. Blend for 30 seconds at low speed, increase speed to medium and blend for an additional two minutes.
Add crumbled blue cheese. Blend at low speed for no longer than four minutes. Stop mixer occasionally to scrape down sides of bowl and paddle as the cheese can collect there.
Refridgerate for 24 hours before serving. Makes about 2 1/2 cups.