Bittersweet chocolate

When you see “70 percent cocoa” on a bittersweet Valrhona chocolate bar, do you know what comprises the remaining 30 percent? Less than 0.5 percent is natural vanilla and lecithin; the rest is, quite simply, sugar—about 30 percent. The 70 percent cocoa comprises about 80 to 90 percent cocoa paste (beans, therefore) and added cocoa butter.