Starbucks is adding oat milk to its menu

FILE - This Jan. 3, 2012 file photo shows the Starbucks Coffee logo in Mountain View, Calif. A growing number of U.S. companies are pledging to give workers time off to vote in the presidential election this November, an effort that’s gaining steam despite the government’s reluctance to make Election Day a federal holiday. Starbucks said Thursday it will give its 200,000 U.S. employees flexibility on Election Day, encouraging them to plan ahead with managers and schedule time to vote or volunteer at polling places. (AP Photo/Paul Sakuma, File)

(CNN) — Starbucks is adding oat milk to its menus across the United States beginning Tuesday as demand for non-dairy alternatives surges.

Oat milk has become especially trendy in recent years among coffee drinkers avoiding dairy. Starbucks is serving Oatly, the Oprah Winfrey-backed brand that recently announced plans to go public.

Starbucks said that the arrival of oat milk comes at a “time when customers are seeking more plant-based choices to incorporate into their daily routines.” Citing Nielsen data, the chain said US oat milk sales soared 170% over the past year.

Demand for oat milk has been a boon for Oatly, too. Last summer, the Swedish company scored a $200 million investment from a Blackstone-led investment group that included Oprah, Natalie Portman, Jay-Z’s entertainment agency and former Starbucks CEO Howard Schultz. Oatly is seeking to be valued at $10 billion, according to Bloomberg.

Last year, Starbucks tested new oat milk-based lattes on menus at 1,300 locations across the Midwest. The chain announced the plans for a national expansion in December.

Starbucks is also betting big on iced drinks, including a new Iced Brown Sugar Oatmilk Shaken Espresso and a Iced Chocolate Almondmilk Shaken Espresso.

The company is expanding its non-dairy and plant-based food options as well. Starting Tuesday, the menu will include a Chickpea Bites and Avocado Protein Box.

Oat milk joins soy milk, coconut milk and almond milk as non-dairy options for Starbucks customers. Dunkin’, the company’s largest rival, added oat milk to menus nationwide in August.