Which ingredient is NOT found in a classic margarita?

In a classic margarita, the essential ingredients include tequila, fresh lime juice, and a sweetener such as triple sec. The use of matcha, a powdered green tea, is not part of the traditional recipe. A classic margarita is known for its refreshing citrus flavor, which comes from the lime, and the distinctive taste of tequila, typically El Jimador Blanco in many margarita recipes. Triple sec adds sweetness and complexity but does not alter the fundamental nature of the drink. Thus, the presence of matcha makes it an ingredient that is not traditionally associated with or recognized in a classic margarita.