(TrendHunter.com) It seems that Shake Shack is officially ready for fall because the chain just announced the launch of three seasonal shakes, including the new Apple Cider Shake and the new Choco Salted Toffee Shake.... (TrendHunter.com) It seems that Shake Shack is officially ready for fall because the chain just announced the launch of three seasonal shakes, including the new Apple Cider Shake and the new Choco Salted Toffee Shake....