"Miami, Florida, USA - June 28, 2012: Child hand holding A  Coffee Frappuccino  in Miami, Florida. Starbucks Frappuccinos are coffee drinks blended with chocolate and syrup. Starbucks Coffee is an American coffee chain with shops all over the world."
Food - Drink
Does Starbucks Have An Official Secret Menu?
From the Butterbeer Frappuccino to the obviously-named Purple Drink, most every coffee lover has tried or heard of unofficial Starbucks beverages. There are over 170,000 different possible ways to combine Starbucks ingredients and make drinks, so these “secret menu” items that often go viral on social media are a natural outcome.
However, while there is an entire website dedicated to the Starbucks secret menu, this site is unofficial, as are social media posts about secret menu drinks. The Starbucks company does not officially recognize these items and does not train employees to make them, so there is no such thing as an "official" Starbucks secret menu.
You'd do best not to confuse your barista and just order your secret menu item as a custom drink, instead of asking for it by name. A barista may not know the Peach Cobbler Frappuccino, but they can make a Vanilla Bean Frapp with two pumps of peach syrup, one pump of cinnamon dolce syrup, and blended-in whipped cream.