David Embury, the author of The Fine Art of Mixing Drinks, believed a cocktail should whet the appetite, not dull it. And that a drink should be made with good-quality liquors, and should not be sweet or syrupy. His Bourbon Cocktail is just that: a complex yet balanced elixir.
What to buy: Bénédictine D.O.M., a golden liqueur first produced by Benedictine monks in the 16th century, adds a sweet, aromatic flavor to cocktails. It can be found at well-stocked liquor stores.