The Unicorn Frappuccino from Starbucks is a pink and purple drink that tastes like a sweet and sour mix of berries. Some people say it tastes like cotton candy, while others compare its flavor to that of the popular children's fruit snack, Tangy Taffy. Regardless of what it tastes like, the Unicorn Frappuccino has become one of the most popular drinks at Starbucks since its release in April 2017.