Depends on the specific dark chocolate. Yeah, Hershey's dark chocolate is mostly sugar. But a lot of people prefer dark chocolates with much higher cacao ratios

Depends on the specific dark chocolate. Yeah, Hershey's dark chocolate is mostly sugar. But a lot of people prefer dark chocolates with much higher cacao ratios. 85% dark chocolate has something like 3-4g sugar per serving. That’s less than what’s in a typical slice of bread in the US. Which may say more about the bread than about the chocolate — but the point is that you’re probably getting more sugar in your “healthy” lunch sandwich than in the morsel of dark chocolate you have for dessert afterwards. (P.S. the chocolate also has more fiber than the bread!)