Back by popular demand! Taco Bell Free Black Jack Taco 10/31/09 6PM-Midnight http://www.tacobell.com/freeblackjacktaco/
Is there a flavor component in the black shell or did they just color it and it tastes like a regular taco?
They probably use blue corn, but it is a total sales gimmick. Basically like slapping a "new and improved" on a label.