Liquid vs. dry measurement: when an ounce doesn't equal an ounce

When does an ounce not equal an ounce? More frequently than you might think, unfortunately. This seemingly illogical statement arises from one of the many quirks in the American system of measurements, where amounts of dry ingredients and liquid ingredients are both described in terms of ounces — even though those ounces are not equivalent in any way. If you are not aware of this difference, it can cost you big time — in terms of money spent, and/or results…