Which ingredient is typically absent in an Irish coffee?

In an Irish coffee, the drink is traditionally made with a combination of hot coffee, Irish whiskey, sugar, and topped with cream. The essential components focus on blending the warmth and richness of coffee with the smoothness of Irish whiskey and the silky texture of the cream.

Chocolate syrup is not a standard ingredient in an Irish coffee. While it might be included in some variations to add sweetness or flavor, it is not part of the original recipe and essentially deviates from the classic flavor profile that emphasizes the interplay between coffee, whiskey, and cream. The ingredients that are present, such as Irish whiskey and cream, contribute to the drink's warmth and character, while chocolate syrup would introduce a different taste that is not associated with traditional Irish coffee.

In contrast, Irish cream, espresso, and cream are integral components that define the richness and signature taste of the drink, which is why identifying chocolate syrup as the absent ingredient is a correct choice.