The magic of Starbucks Frappuccinos is the Frappuccino base syrup. Make a batch of this first and store it in the refrigerator to make more Frappuccinos.
Frappuccino base syrup is just simple syrup with xanthan gum. The simple syrup sweetens and the xanthan gum thickens the drink. If you don't want to use the Frappuccino base syrup, just use simple syrup to sweeten. Your drink will be a bit icy with the chai separating from the ice though.
Starbucks uses a Tazo chai concentrate to make the Chai Frappuccinos. (The concentrate they use is stronger). It's an easy shortcut since you don't have to brew any tea.
Don't put ice into the blender first. For an efficient blend, add ingredients into the blender in the order it's shown on the ingredient list.
Making whipped cream at home is so quick and easy when you use a handheld milk frother. In less than a minute, you'll get fluffy, decadent whipped cream. Whole milk is what's used in Starbucks Frappuccinos but you can use any milk you like.