Shake Shack is adding the deeply savory taste of French onion soup to its new seasonal burger lineup and officially debuting a highly requested new side -- onion rings -- to the menu for the first ...
The newest burger at Shake Shack is inspired by a hearty soup just in time for fall. Shake Shack is launching a new line of foods based on French onion soup on Friday, Sept. 12. Shack App users gained ...