Expensive chocolate bars: A load of crock? in Kitchen Consumer Posted January 7, 2008 What is the composition of a Hershey bar? The F.D.A. requires 15% and 10%chocolate liquor by weight percent for sweet and milk chocolate respectively. Obviously most of the % of chocolate given on a chocolate bar includes the total of chocolate liquor, cocoa and cocoa butter. However, if you are comparing something like a 75% bar and a 15/10% bar I think that you would notice a big difference. Most "chocolate" eaten doesn't contain that much chocolate at all.As FG says, I have tastes some pretty terrible "premium" bars, this isn't the final word on quality.Even premium bars of the same chocolate %, there is a huge range in flavour and textures, the ones I prefer taste of plums and raspberries, given the range of producers, bean types, locations etc this makes sense.