Autumn Flavors: Seasonal Treats at Steak 'n Shake As the fall season arrives, Steak 'n Shake embraces the cozy flavors of autumn with its rich and creamy hand-spun milkshakes. Just as some look forward to pumpkin spice flavors, Steak 'n Shake fans eagerly anticipate their seasonal shake offerings that bring a taste of fall in every sip. Fall-Insp