Summer just got sweeter! Longtime partners Shake Shack® and Mast Brothers are joining forces to bring you a limited edition Chocolate Beer Float (£5.00)— the Covent Garden Shack will be servin’ up the good stuff from Monday 17th August to Sunday 23rdAugust 2015.  This one-of-a-kind delectable treat combines Shake Shack’s dense, rich and creamy vanilla … More Shake Shack UK Teams up with Mast Brothers for limited Edition Chocolate Beer Float