Money Burger King to test plant-based Impossible Croissan’wich in select markets starting in late January January 7, 2020Kelly Tyko, USA TODAYComments Off on Burger King to test plant-based Impossible Croissan’wich in select markets starting in late January Burger King will soon start testing the Impossible Croissan'wich in markets including Albuquerque, New Mexico; Montgomery, Alabama; Lansing, Michigan.