How to make the Coffee-Vodka – Boil Water and Sugar until dissolved. Turn off heat. Slowly add dry instant Coffee and continue stirring. Add a chopped Vanilla bean to the Vodka, then combine the cooled Simple Syrup and Coffee solution with the Vodka. Cover tightly and shake vigorously each day for 3 weeks. Strain and filter. it’s also best to let the Sugar Mixture cool completely so the Vodka won’t evaporate when it’s added. If you like a smoother feel to the Liqueur you can add about 1 Teaspoon of glycerine to the finished product.