Blackberry acid is a strange name for a cooling blackberry drink concentrate. This recipe comes from the Cross Country Cookery cookbook and the author added, “Mother’s recipe belonging to her Aunt “Gar. This is an old recipe – makes a delicious drink!”
The one ingredient that threw me was “Tartaric Acid,” but I shouldn’t have worried. Tartaric Acid is salt, potassium bitartrate and it’s commonly known as cream of tartar – something you can easily pick up in the spice aisle at your local supermarket.
- 1 1/2 gallon blackberries
- 1 gallon boiling water
Add boiling water to blackberries. Let stand 24 hours. Strain.
To every PINT of juice add 1/2 pint sugar.
Add 6 oz of tartaric acid and let stand 48 hours.
Put on stove and bring to boil. Cool and bottle. Don’t seal.
To serve, add 3 tablespoons to a glass of water and crushed ice.