Dark chocolate's gourmet status was built by French tastemakers, not ancient tradition
Dark chocolate's image as the connoisseur's choice is surprisingly recent. In the late 1970s French chocolatiers led by Robert Linxe turned their country's palate against milk chocolate, then exported the language of terroir and single estates to America. The health halo is shakier: high-quality clinical evidence remains thin.
Dark chocolate combines chocolate liquor, cocoa butter and sugar, with more cocoa than milk or white chocolate. Britons long called it plain chocolate, and in East Asia it is black chocolate. People have used cacao for a very long time: the Mayo-Chinchipe people of present-day Ecuador did so around 3300 BC. The word dark itself only arrived after modern milk chocolate was invented in 1875, to tell the traditional kind apart.
Its prestige came later still. With cocoa cheap in the late 1970s, Linxe's advocacy swung French connoisseurs towards dark, and a national campaign in the following decade promoted sophisticated locally made bars. In the 1990s those flavour standards were deliberately exported to the United States through guides and tastings that talked of bean varieties and estate growths, pushing high-cocoa bars with pepper or ginger at premium prices. By the late 2000s preferring dark was seen in America as a sign of a discerning palate.
Flavour depends heavily on bean quality. Researchers count 60 compounds contributing to taste, 33 of them particularly important, some created by Maillard browning reactions, and the result can range from smoky to nutty to sour. Dark is harder than milk chocolate thanks to its particle size and fat content, and a little milk fat is sometimes added to delay the whitish bloom that forms on stored bars.
The nutrition story is mixed. A 100-gram serving holds about 600 kilocalories and is rich in minerals such as iron and magnesium. Trials found only small blood pressure changes of 1 to 2 mmHg, and a 2021 systematic review saw improvements only in blood lipids. A 2024 study linked eating more than five servings a week to about 20 percent lower risk of type 2 diabetes, but the industry, notably Mars, has funded much of this research. Heavy metals are a concern: a 2024 report found 43 percent of US samples exceeded California's Prop 65 levels for lead, though another study suggested the risk falls mainly on children.
Source: Dark chocolate
