Recipe: Sugar Vinegar

To every gallon of water allow a pound of the best brown sugar, and a jill or more of strong yeast. Mix the sugar and water together, and boil and skim it till the scum ceases to rise. Then pour it into a tub; and when it cools to lukewarm heat, put into it the yeast spread on PIEces of toast. Let it work two days; then put it into an iron-hooped cask, and set it in a sunny place for five months, leaving the bung loose, but keeping the bung-hole covered. In five months it will be good clear vinegar, and you may bottle it for use.

A cask that has not contained vinegar before, should have a quart of boiling hot vinegar poured into it, shaken about frequently till cold, and allowed to stand some hours.

Directions for Cookery, In Its Various Branches.
Ladies and Professional Cooks.
The Whole Science and Art of Preparing Human Food. (Year 1840)