At our family Thanksgiving, my mom and her siblings talked about the vinegar candy their dad would make. I thought I'd put it here.
3 parts sugar
2 parts vinegar
1 part water
Cook until it reaches the hard crack stage (when the mixture is tried in cold water, it becomes brittle). Pour into a well buttered pan and allow to cool (if it's winter, place it in the snow!). When it's cold, break into pieces.
*I'm not sure if this is how it's made (the directions) for sure, but it's what I seemed to remember. If I'm wrong, please let me know!