Peel and quarter walnuts, fill an empty 1 liter bottle approx. 1 / 4-1 / 3 with the walnut pieces. Then add the vanilla sugar, rock candy and honey and fill the bottle with the fruit schnapps. Close the bottle with a cork and place it in a sunny, warm place for approx. 2 - 3 months, e.g. a sunny window on the south side. During this time, gently shake the bottle once a week.