The applejack rabbit is a marvelous cocktail. Simple, sumptuous, and incredibly well-balanced, it also makes a perfect drink for celebrating the autumn harvest season. It starts with an ambrosial base of applejack or Calvados and then combines the lively tartness of fresh citrus with the rich sweetness of maple syrup. The original recipe dates back nearly a century, and its longevity is a testament to the fact that the best cocktails are often both surprisingly easy to prepare and luxurious to sip.