Which ingredient is used to add sweetness in a Lemon Drop Martini?

The ingredient that adds sweetness to a Lemon Drop Martini is fine sugar. This cocktail typically consists of vodka, lemon juice, and a sweetening agent. Fine sugar is often used because it dissolves easily into the drink, creating a balanced flavor profile that complements the tartness of the lemon juice.

In a classic Lemon Drop Martini, the sweetness is essential for rounding out the acidity of the lemon, making the drink enjoyable and refreshing. While orange liqueur can also provide some sweetness and flavor complexity, it introduces additional citrus notes rather than simply sweetening, which is not the primary purpose in this context. Cranberry juice is tart and sweet but does not align with the intended flavor profile of a Lemon Drop Martini, as it can overshadow the central lemon flavor. Dry vermouth is primarily used in cocktails for its herbal, aromatic qualities and does not contribute sweetness.

Thus, fine sugar is the ideal ingredient for achieving the desired sweetness in a Lemon Drop Martini.