Combine the elderberries and water in a large pot without a lid.
Bring the mixture to a boil, then reduce the heat to low.
Simmer until the liquid is reduced to half its original volume.
Once the liquid is reduced by half, strain the herbs through a tightly woven muslin cloth.
Strain out the herbs and allow the liquid to cool slightly.
Add the honey once the liquid has cooled down to be slightly warm.
This allows for the honey to mix in well without disturbing the enzymes from over-heating.
Add the brandy, if using, and mix well.
Pour into sterilized storage jars.