It's Almost Too Easy To Order A Starbucks Cinnamon Roll Frappuccino - Tasting Table
Briefly

The Starbucks secret menu features unique flavor combinations like the Cinnamon Roll Frappuccino, which customers can customize with syrups and toppings for an enhanced experience.
To order a Cinnamon Roll Frappuccino, get a Vanilla Bean Frappuccino and add cinnamon dolce syrup. The number of syrup pumps depends on the drink size.
Starbucks previously offered a limited-time Cinnamon Roll Frappuccino in 2015, blending cinnamon dolce syrup, white chocolate mocha, and whipped cream, setting a fan-favorite benchmark.
For customization, customers can add white chocolate, chocolate malt powder, or sauces like mocha, providing a personalized touch to their Frappuccino.
Read at Tasting Table
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