A limoncello lemon drop is a type of martini that contains lemon liqueur. A lemon drop martini typically combines vodka, lemon juice and sugar. Some recipes call for additional ingredients, such as limoncello.
The lemon drop martini gets its name from lemon drop candy. The drink imitates the candy's very sweet and very sour taste. Limoncello tastes very sweet and has a strong lemon flavor but is not sour, so its addition to the drink enhances the lemon juice rather than replacing it. A limoncello recipe available at FoodNetwork.com combines lemon peel, vodka, water and sugar and involves steeping the lemon peels in the vodka for several days.