Put the elderberries into a pint sized mason jar, then add the honey to cover the berries leaving at least an inch of head space at the top of the jar.
Cap the jar with a plastic storage lid or use a piece of parchment paper underneath the metal lid. Invert the jar for about 30 minutes or longer to make sure that all of the elderberries are coated with honey.
Turn the jar upright again. After the elderberries and honey have settled and all of the air bubbles are gone you may need to add a bit more honey to cover the berries.
Loosen the lid to allow air to escape during fermentation and place the jar somewhere out of the way. For the first 2-3 days it is helpful to invert the jar daily then turn it upright again. Be sure to tighten the lid before inverting then loosen again once upright.
Within about 2-3 days (could be longer in cooler temperatures) you should begin to see small bubbles on the surface and the honey will be noticeably runnier.
After one or two weeks you will see a lot of bubbles! Give it a stir now and then and it will really bubble up. The honey is ready at any point after this and will continue to slowly ferment for weeks and months.
Strain out the elderberries before consuming.
Take a spoonful two to three times per day when you feel a sickness coming on to shorten the duration of a cold or flu.
Notes
You can use dried elderberries instead of fresh if you would like, but they will need to be rehydrated in water first before combining with the honey.
Serving: Take a spoonful two to three times per day when you feel a sickness coming on to shorten the duration of a cold or flu.