What does Rootana taste like? Rootana has been designed to provide a natural taste rather than an artificial one. For this reason, we use a tiny amount of naturally occurring coconut sugar to provide sweetness instead of using sucralose or stevia. The predominant taste of Rootana comes from the high-quality oat flour used in the formula. Rootana can also be blended with any number of healthy ingredients to create your own tasty shakes.