Starbucks uses Oatly Barista Edition oat milk in its coffee beverages. This oat milk is specifically crafted for use in coffee drinks, as it foams well and has a creamy texture, making it an excellent addition to coffee beverages such as lattes and cappuccinos. Oatly oat milk is unsweetened, which means its a popular choice for adding to coffee or baking recipes without adding extra sugar. This oat milk is part of Starbucks core U.S. menu and is available year-round.