Which of the following drinks is characterized by a strong coffee flavor?

The drink recognized for its strong coffee flavor is espresso. Espresso is prepared by forcing hot water through finely-ground coffee beans, resulting in a concentrated shot that showcases the full-bodied essence and rich taste of the coffee. This method of preparation emphasizes the natural characteristics of the coffee beans, delivering a bold and intense flavor profile that is distinct and robust.

While the others have coffee components, they are typically blended with various ingredients that can dilute or mask the coffee's inherent strength. For instance, a Cinnamon Dolce Latte incorporates steamed milk and flavoring syrups, which contribute sweetness and creaminess, softening the coffee flavor. A cappuccino contains equal parts espresso, steamed milk, and milk foam, offering a balanced profile but not as intense as straight espresso. A Frappuccino, often served blended with ice and various flavorings, is typically sweeter and creamier, making the coffee flavor less pronounced. Thus, among the options given, espresso stands out as the drink that delivers the most powerful coffee flavor.