Recipe Courtesy of Reasor's
- Put berries in a heat-resistant, non-reactive container.
- Bring water to a boil in a large saucepan over medium heat.
- Stir in tartaric acid, and pour mixture over berries.
- Allow to cool.
- Cover, and let rest overnight.
- Strain berries, pressing only very gently, and discard berries.
- Pour liquid into a saucepan, and add sugar.
- Heat and stir over very low heat until sugar is dissolved.
- Remove from heat, and cool acid.
- Store in refrigerator for 1 week before using.
- To serve, pour 2 ounces or more of blackberry acid over crushed ice in a glass, and fill with still or sparkling water.