(TrendHunter.com) The Chick-fil-A Autumn Spice Milkshake is being test marketed by the QSR brand to provide patrons with a way to enjoy a sweet treat that doesn't skimp on autumnal flavor as we head into the... (TrendHunter.com) The Chick-fil-A Autumn Spice Milkshake is being test marketed by the QSR brand to provide patrons with a way to enjoy a sweet treat that doesn't skimp on autumnal flavor as we head into the...