Recipes Fennel Syrup Be the first to rate & review! Use this syrup to make the Napier cocktail.Plus: Ultimate Cocktail Guide By Food & Wine Editors Updated on June 29, 2021 Print Rate It Share Share Tweet Pin Email Yield: 4 ounces Ingredients 1 1/2 tablespoons fennel seeds, crushed 4 ounces Simple Syrup Directions In a bowl, cover the crushed fennel seeds with the Simple Syrup and let steep for 2 hours. Strain and refrigerate for up to 5 days. Rate it Print