Classic Mixology: Cocktail & Mixed Drink Recipes

alum

Also Known As:  alum powder What it is:  Additive
Water soluble compound with an astringent, acid and sweetish taste. Alum powder, found in the spice section of many grocery stores, may be used in pickling recipes as a preservative to maintain fruit and vegetable crispness. Alum is used as the acidic component of some commercial baking powders.
Note:  baking powder? Further reading:  http://en.wikipedia.org/wiki/Alum