Starbucks and Dunkin' both just announced they are adding oat milk to their menu.
Dunkin' says it will be available nationwide this spring. They are also adding an Oatmilk Latte to their menu which is oat milk, and espresso. You can order it hot or iced.
Starbucks announced the addition of oatmilk last week, but they are currently only available in stores located in Illinois, Indiana, Iowa, Michigan, Minnesota, Missouri and Wisconsin.