The Twentieth Century Cocktail
Here's my recipe for the Twentieth Century:
1 1/2 oz gin
1/2 oz. fresh lemon juice
1/2 oz Lillet
1/4 oz light cream de cacao
A lot of recipes for this drink call for equal parts of the Lillet/lemon juice/creme de cacao. I prefer it the way I've written it above. The chocolate should just be a whisper. A ghostly suggestion. Don't be shy, break out the jigger and measure this one.
If you don't keep Lillet on hand, and need an excuse to expand your ingredient list, this cocktail is it. Just think, you can also make 007' s Vesper Martini with it. If you need more excuses to buy Lillet, head over to CocktailDB and use the ingredient search. They list 82 cocktails that use Lillet.
To my taste, this is one of the best cocktails there is.