What is a common use for flex shots at Black Rock Coffee Bar?

Flex shots are primarily used in flavored lattes at Black Rock Coffee Bar. The purpose of a flex shot is to provide an additional layer of flavor and intensity, enhancing the overall taste of the latte. When combined with various syrups and the creamy texture of steamed milk, flex shots can take flavored lattes to the next level, making them more enjoyable and customizable for customers. This technique allows baristas to create a unique drink experience that aligns well with Black Rock's emphasis on quality and flavor diversity.

While other options like blended drinks or lattes may seem plausible, the specific context of flex shots is best illustrated in the formulation of flavored lattes, where the balance of espresso and flavor is crucial.