Place the berries in a saucepan and cover with water.
Bring to a boil, reduce the heat and simmer over low heat for 30-45 minutes.
Remove the pan from the heat.
Smash the elderberries well (I used a potato masher).
Strain the mixture through a fine-mesh strainer.
Stir in 1 cup of honey (or more or less to your taste).
Bottle the syrup and store in the refrigerator.
Keeps for 3 months.
Notes
When making elderberry syrup it’s important to use only blue elderberries. Red elderberries are potentially toxic if eaten in large quantities. Never eat raw elderberries.