Shake Shack has nearly 350 locations in the U.S. and another 134 around the world and is valued at more than $4 billion. With dozens of new locations opening later this year, the team in the Innovation Kitchen is constantly developing new offerings. In order for a menu item to reach customers, it needs to be approved by Shake Shack's 13-person tasting panel. How delicious an item is is only one of the factors that the Innovation Kitchen team thinks about when developing new recipes. Shake Shack's latest limited time offering — a barbeque inspired menu — was months in the making.

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Persons: John Karangis, Karangis, Shake Organizations: CNBC, Shack, Innovation Kitchen's, Innovation Locations: U.S, Bangkok, Thailand, Japan, Tokyo