This Low Calorie Starbucks Oat Milk Brown Sugar Latte is low calorie, low sugar and low carb!You can make these oat milk coffee drinks 2 ways: Shaken and Easy... In one set of directions you will learn how to make a Shaken Coffee Drink, and the second method just a simple oat milk iced latte. Special Tip: If you prefer to use real brown sugar that will work too!