This fan-favorite Shake Shack secret menu item is incredibly easy to order - as long as you know exactly how to ask for it.

From the various flavors that have been available to the struggles of unveiling it nationwide, here's what you should know ...

The South Side Soda Shop in Goshen, Indiana, is a time machine disguised as a diner, and its milkshakes are the secret fuel ...

Buckle up, because we’re about to take a delicious trip down memory lane in Goshen, Indiana, where the milkshakes are so good ...