What is the primary ingredient in a London Fog Tea Latte?

The primary ingredient in a London Fog Tea Latte is tea. This drink is traditionally made using Earl Grey tea, which is a black tea flavored with oil of bergamot, providing its distinctive aromatic profile. The latte style preparation involves steaming milk and adding it to the brewed tea, often sweetened with vanilla syrup. While other ingredients can enhance the flavor or presentation of the drink, it is the tea that serves as the foundational component that defines a London Fog. The presence of tea is what differentiates it from coffee-based beverages and makes it a popular choice for those seeking a warm drink without caffeine from espresso.