Baggett writes that often, especially with chocolate blends, the exact percentage of cacao isn't immediately clear. For semisweet and bittersweet bars, she recommends simply comparing the grams of sugar per serving with the total grams per serving listed. For example, if a chocolate bar indicates that a serving size is 40 grams and 20 grams are from sugar, you can safely guess that it has about a 50% cacao content.
Do note that this method won't work for milk chocolate or bars with additions of nuts or other mix-ins.
Smart, eh? Check out Nancy's great book — it's full of great tips like that.
Find the book at your local library, independent bookstore, or Amazon: Simply Sensational Cookies by Nancy Baggett
(Image: Megan Gordon)