Starbucks cafes nationwide will carry Oatly’s nondairy substitute. The oat milk will be incorporated into Starbucks’ spring menu through the new Iced Brown Sugar Oatmilk Shaken Expresso.

For Oatly, coffee shops are a crucial way to introduce consumers to its signature product. Consumers can try oat milk — usually for a small additional charge, which is common for milk alternatives — without committing to buying an entire carton. The approach has helped Oatly create a large fan base and hold onto it, even as new competitors like Chobani or private-label products entered the market. In the last year, oat milk sales in the U.S. climbed more than 170% during the 52-week period ended Feb. 13, compared with the same time a year ago.