Shake Shack is giving away free Concretes tonight from 5:30 p.m. - 7:00 p.m. to celebrate the week long DesignPhiladelphia event. Philadelphia's own Nook Bakery and La Colombe teamed up with Shake Shack to create Nook's Fall Look (Vanilla custard, Graham cracker pumpkin pie) and La Colombe's Espresso Session (Chocolate custard, espresso beans, cannoli shells and cinnamon fudge sauce). [EaterWire]
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