In a large glass, mix the grated and quartered green nuts with the alcohol, cinnamon, vanilla pod, juniper berries and allspice. Seal the jar and let it steep for 8 weeks in a dark, cool place. Filter.
Then briefly bring the white wine to the boil with the sugar until the sugar has completely dissolved. Let cool down. Mix the cooled wine-sugar syrup with the filtered nut extract, fill into bottles and leave to rest for at least 4 months.