They did come out with a Toasted White Chocolate Mocha Frappe a while back, too. I asked one of the baristas at Starbucks about the difference and he said the latter has a toasted syrup flavor.

Starbucks works in mysterious ways sometimes, especially when it comes to determining what beverages are seasonal and why. Nothing about the toasted white chocolate mocha, for example ...

While most Starbucks Frappuccinos' start with whole ... swap out traditional mocha syrup for a few pumps of both white ...