Which of the following cocktails includes Kahlua as an ingredient?

The Mudslide is a cocktail that includes Kahlua, which is a coffee-flavored liqueur. This drink typically combines Kahlua with vodka and Irish cream, creating a sweet, rich flavor profile that highlights the coffee notes from the Kahlua. The Mudslide can be served in various ways, including on the rocks or blended with ice, and it's popular for its indulgent taste.

In contrast, the Margarita is traditionally made with tequila, lime juice, and orange liqueur, and does not feature Kahlua. The Piña Colada is a tropical drink made from rum, coconut cream, and pineapple juice, which also does not involve Kahlua. Similarly, the Strawberry Daiquiri, made with rum, lime juice, and strawberries, does not include Kahlua either. Thus, the inclusion of Kahlua as a key ingredient is what makes the Mudslide the correct choice in this context.