NYT Cooking: A marvel of a cocktail with an enviably colorful peerage, the Boulevardier is effectively a cross between a Manhattan and a Negroni. In colder months, it’s a magnificent drink to have as a fallback when you want something richer and more complex than just a whiskey but can never seem to think of what else to order. It’s composed of two parts American whiskey, with one part each of sweet vermout...
