This recipe from Jesse Smith of 5 by 5 Tonics incorporates vanilla beans into a sultry batch of bitters perfect for richening a classic Manhattan or a Vida Old Fashioned. “These bitters are definitely best suited for cocktails with a creamy, rich or warm flavor,” says Smith, an herbalist and acupuncturist who moonlights as a producer of cocktail bitters. Smith doesn’t yet sell a bottled vanilla bitters, but his 5 by 5 Aromatic Bitters and 5 by 5 Aged Citrus Bitters can be purchased through his website and at a growing number of retailers in the Chico and San Francisco areas. As for this recipe, all you need is eight ingredients and two weeks’ worth of patience.