I tried vanilla syrups from Torani, Monin, DaVinci, and Portland Syrups to find the best one to add to my coffee for extra flavor.

Starbucks is also testing a new feature in its app that shows pricing updates in real time, instead of revealing the final price at checkout.

Starbucks is changing the way it charges for customized drinks, adding an 80-cent fee for sauces and syrups, the giant coffee chain said. Classic syrup is free.

Starbucks now charges 80 cents for syrups and sauces in unflavored drinks, with price hikes for chai, matcha, and dried fruit. Learn about the app's new pricing feature.

Starbucks is moving to standardize prices for matcha and syrups, as well as testing a new feature that helps customers figure out how much drinks will cost.