Quantities for a 1 litre preserving jar.
12 oz Castor Sugar
Discard any damaged berries and wash in clear water and dry gently. Fill the jar by one third with blackberries, add 12oz of sugar. Pour in the Vodka and Brandy in equal measure until you are left with 5cm of headroom in the jar. Seal the jar and turn it upside down until the sugar is well mixed in, place the jar into a cool dark cupboard. Repeat this process every week for at approximately 10 to 12 weeks. Line a plastic sieve with two layers of muslin and pour your brew in and leave to strain.