When you have harvested around 2/3 of a bucket (around 2 kg of elderberries) then remove the bigger stems and any bad or unripe berries (unripe berries can be toxic to eat raw)
Freeze the berries in a bag over night
Sterilize the bottles (bottles to hold around 2 litres). Boil the bottles in a big pot for 10 min.
Rinse berries, then place in a big pot with the water and bring to a boil
Slice the apple and add to the pot, boil for 30 min
Use a ladle to mash the berries
Strain through a muslin, coffee filter, cheesecloth or similar fine mesh sieve. Let it strain through for around 30 min
Measure the liquid and add 500 g sugar to every litre in a pot
Bring to a boil while stirring to dissolve the sugar (around 5 min) then remove the froth.
Fill upp the bottles and place in fridge once it has cooled
To make a refreshing juice you need to add 4 parts of cold water for every part of elderberry cordial