It’s a good idea to pull the recipe up on your phone so that you can refer to it if needed when ordering. The Starbucks employees probably won’t know about the drink. The Starbucks secret menu is maintained by fans, not by Starbucks, so the employees are not trained to make these drinks.
For example, the base drink for a Twix Frappuccino is a Caramel Frappuccino.
Know the specific toppings on your drink as well, such as mocha drizzle, whipped cream, or chocolate chips. Be prepared to pay for the extra additions.
For example, if you’re ordering a Red Velvet Frappuccino, you’d say “a half White Chocolate Mocha and half Regular Chocolate Mocha Frappuccino with 2 pumps of raspberry syrup topped with whipped cream, please. ”[6] X Research source
This drink is well-known, so the barista may already know how to make it.
