- 1/2 cup Sherry vinegar
- 1/2 cup packed light brown sugar
- Bring vinegar and sugar to a boil in a 1-quart heavy nonreactive saucepan over moderate heat, stirring until sugar is dissolved. Reduce heat and simmer until slightly syrupy and reduced to about 1/2 cup, about 15 minutes. Pour into a heatproof bowl and cool completely.