What is a "juniper" flavor?
"The word "juniper" as a descriptor, the berries are tart, almost pine-y in flavor, and have a citrusy after taste — hence why so many people associate it with the smell or "taste" of trees. The Starbucks Juniper Latte takes on these flavors with a juniper syrup blended with espresso and steamed milk, which is then topped with foam and a dusting of pine-citrus sugar to bring out the wintry flavors."
In English, it's a berry that comes from trees so it gives you this tree-like taste! Something worth trying eh? You can also customize your latte with different milks too.