What characterizes a dirty chai?

A dirty chai is characterized by the addition of espresso to a traditional chai tea. This combination enhances the drink's flavor profile by adding the rich and bold taste of espresso to the spice and warmth of chai, creating a unique beverage that appeals to both chai lovers and coffee enthusiasts. The incorporation of espresso gives the drink an extra caffeine boost and a distinctive taste that differentiates it from regular chai offerings.

The other choices do not align with the standard definition of dirty chai: a chai without milk lacks one of the foundational components of chai, a chai with extra flavor may refer to flavored variations but doesn’t specify the addition of espresso, and a chai served cold describes the temperature rather than the preparation style that makes it "dirty."