Nancy Luna/Business Insider
- Jack in the Box quietly rolled out the Smashed Jack burger in early January.
- The chain's first new burger in eight years was expected to be available for six weeks.
- It sold out in two weeks. The chain plans to bring it back for a national rollout next month.
Jack in the Box wants the Smashed Jack to be the "best burger" in the fast-food industry.
It's off to a great start.
Two weeks after launching, the Smashed Jack has become a fast-food unicorn. It's nearly impossible to find as the chain ran out of supplies to make the specialized burger, which customers couldn't get enough of.