One good thing about Starbucks is its many milk options. In addition to the standard 2%, whole, and nonfat milks, the Starbucks menu also offers almond, soy, coconut, and oat milks. Oat milk, specifically Oatly brand oat milk, is the most recent addition to the menu, only becoming available nationwide in early 2021 (via Starbucks Stories & News ). However, Starbucks oat milk's journey has not been an easy one. According to CNN Business, within just one month of oat milk officially being on the menu, Starbucks faced an oat milk shortage. Sure, part of this shortage tied back to pandemic-related production challenges, but oat milk's growing popularity certainly didn't help. Furthermore, oat milk, as well as the other plant-based milks, came with an upcharge on your drink, causing celebs like Paul McCartney to call Starbucks out. The latest oat milk scandal has to do with an alleged brand change.