Often used as a beverage this makes a nice salad dressing.
blackberries, clean and dry
Place berries in an earthenware vessel.
Cover with vinegar.
Let stand three days (this will draw out the juice from the berries).
To strain place cheesecloth over a bowl, pour in the mixture.
Let strain several hours.
Measure the amount of liquid you have (discard berries).
You will need 1 pound of sugar for every pint of liquid.
In a pan boil vinegar with sugar gently for 5 minutes.