purple drink

To dye for?
To dye for?
To dye for?
I am not a regular coffee shop drinker, but when I heard that the place that rhymes with "FarBucks" just added something on their "secret menu," I knew I wanted to try it! It's loaded with what tastes like blackberries, passion fruit tea with soy milk, and a mystery ingredient whose place I couldn't quite place (turns out it was vanilla syrup)...