Recipe: Cider Vinegar

Take six quarts of rye meal; stir and mix it well into a barrel of strong hard cider of the best kind; and then add a gallon of whiskey. Cover the cask, (leaving the bung loosely in it,) set it in the part of your yard that is most exposed to the sun and air; and in the course of four weeks (if the weather is warm and dry) you will have good vinegar fit for use. When you draw off a gallon or more, replenish the cask with the same quantity of cider, and add about a pint of whiskey. You may thus have vinegar constantly at hand for common purposes.

The cask should have iron hoops.

A very strong vinegar may be made by mixing cider and strained honey, (allowing a pound of honey to a gallon of cider,) and letting it stand five or six months. This vinegar is so powerful that for common purposes it should be diluted with a little water.

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

Vinegar may be made in the same manner of sour Wine.