Starbucks Faces Federal Suit Alleging its Sugar-Free Protein Drinks Contain More Sugar than a Reese's Cup – CoffeeTalk

Starbucks is currently embroiled in a federal lawsuit filed in Seattle, alleging that its protein drinks marketed as “sugar-free” may in fact contain more sugar than a Reese’s peanut butter cup. The lawsuit, initiated by the law firm Hagens Berman on behalf of three consumers from California, New York, and Washington, claims that eight of Starbucks’ U.S. protein beverages contain significant sugar amounts despite being labeled otherwise. For instance, a 16-ounce Sugar-Free Caramel Protein Matcha reportedly contains 16 grams of sugar, while a larger 20-ounce version has 21 grams, compared to only 11 grams in a Reese’s cup.

The plaintiffs argue that the mislabeling is “false, deceptive, and unlawful,” asserting violations of federal labeling regulations. They emphasize the importance of accurate labeling for consumers who avoid sugar for health reasons such as diabetes or general wellness. In defense, Starbucks maintains that the sugar present in its drinks derives from protein-boosted milk rather than added sugar, and asserts that sugar-free syrup is used for flavor.

A Starbucks spokesperson stated that the company has consistently provided transparent nutritional information regarding its products across multiple platforms, including menus and mobile applications. Starbucks intends to fight the allegations vigorously. The company launched its protein drinks in September 2025 to meet rising consumer interest in functional beverages and to compete with brands like Dutch Bros, which introduced its lower-sugar alternatives earlier. The lawsuit seeks damages for affected consumers and a court order to cease the use of the “sugar-free” label on any product containing sugar.

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