Fourteen years ago, Randy Garutti and the Shake Shack team closed shop for the day at their Madison Square Park location, the brand’s first—and only—store at the time. They just achieved what executives thought unthinkable. It was Shake Shack’s first $5,000 day, a milestone “a bunch of fine-dining leaders” couldn’t picture when they put burgers, hot dogs, fries, and shakes on the menu of a fast casual.

This past quarter, Shake Shack scored its first $2 million day. Since its IPO, when the chain exited 2014 with nearly $120 million in revenue, it has increased the figure by nearly 300 percent. And although many restaurants and companies say this, it holds real weight with Shake Shack: As far as it’s progressed, the chain is just getting started spreading one of the more profitable business models in the country across the map.