Did you know the World Tea East tradeshow gets underway in Philadelphia tomorrow. Well, let this be your notice. And in honor of this event, Philadelphia’s Shake Shack is offering a special edition Chai Tea Spiced Black & White Shake. The shake includes vanilla custard spun with fudge sauce and a chai tea spice blend from Philadelphia tea consultant and writer, Alexis Siemons. Perhaps you follow her Teaspoons & Petals web site. Siemon’s created a chai spice blend just for Shake Shack that showcases the black tea anchored by the fall-like qualities of chai (cinnamon, ginger, clove, and vanilla). The rich and creamy frozen custard is available through October 7th for $5.75