Spring 2003. Peter Dukes and an R&D team are holed up in a top-secret room on the seventh floor of Starbucks' Seattle headquarters. They call it the Liquid Lab.
The team brainstorms 20 fall flavors and surveys customers online. Chocolate and caramel do great. Pumpkin lands "right in the middle of the pack," and most respondents pass on a pumpkin pie latte. (Imagine that!)
They keep it anyway, because it scores sky-high on uniqueness.
So the lab fills up with pumpkin pies. Somebody takes a forkful, then a sip of espresso. At one point Dukes just pours espresso onto the pie. About three months of that, and a name like "Fall Harvest Latte" gets floated before Pumpkin Spice Latte wins.
That fall it goes into about 100 stores in Washington, D.C., and Vancouver. "Within the first week of the market test, we knew we had a winner," Dukes said.
Starbucks has sold more than 500 million of them since. And for its first 12 years, the recipe contained no pumpkin at all.
The survey shrugged and the test kitchen found the hit. The independent boba shop has no seventh floor, just an owner doing invoice math after close. Meanwhile limited-time offers are everywhere: Technomic counted 41,707 restaurant LTO launches in 2025, up 157% from 2019, with cold drinks the top category. Checks with an LTO run 26% higher.
Today's small business idea is an LTO lab for boba shops. AI pitches about 30 weird seasonal drinks (Lawson just used AI to dream up a pickle-flavored lemon tart and shipped it to roughly 4,700 Japanese stores). Then hard rules kill anything that blows the food-cost target, needs too many new ingredients or adds prep time. Four finalists ship with costing, prep sheets, POS-ready files and a two-week scorecard. Sell it as a $399 sprint and 25 a month is about $10K, with 7,845 U.S. bubble tea shops to pitch. Every finished test feeds a dataset of what sells, and good luck getting that from a chatbot.
Read the full playbook here:
Restaurant LTO launches hit 41,707 in 2025. A pickle lemon tart from Japan's Lawson shows the AI menu R&D method you can sell to independent boba shops for $399.
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