Dark chocolate is a type of chocolate characterized by a low or absent milk content and is produced by combining cocoa-derived products with sugar in specific proportions. Widely manufactured in the food industry, dark chocolate is classified into different categories based on its cocoa content and is subject to standards established by various regulatory authorities.
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Definition and Composition
Dark chocolate is a type of chocolate primarily composed of cocoa derivatives (cocoa mass, cocoa butter) and sugar, containing either no milk components or only very low amounts. The cocoa solids content typically ranges between 50% and 90%. In both the European Union and the United States, dark chocolate is classified under this designation provided it meets a minimum cocoa content threshold. According to European regulations, the cocoa solids content must be at least 43%, while the U.S. Food and Drug Administration (FDA) requires a minimum of 35%.
Chemical Components
Dark chocolate contains various polyphenolic compounds, primarily flavonoids. Among these compounds are catechin, epicatechin, and procyanidins. Additionally, alkaloids such as theobromine and caffeine are present. The quantities of these constituents vary depending on the amount of cocoa used and the production processes applied.
Production Process
The production of dark chocolate begins with the fermentation, drying, roasting, and grinding of cocoa beans. The resulting cocoa mass is mixed with cocoa butter and sugar, then subjected to conching. This process ensures the chocolate achieves a homogeneous texture and its characteristic aroma. In the final stage, the mixture is tempered, molded, and cooled to solidify.
Nutritional and Health Evaluation
Some scientific studies suggest that flavonoids found in dark chocolate may exhibit antioxidant properties. The European Food Safety Authority (EFSA) has accepted limited health claims related to the effects of flavonoids on vascular health. Similarly, the U.S. FDA permits qualified health claims regarding the reduction of cardiovascular disease risk under certain conditions for cocoa powders high in flavanols. However, the long-term clinical validity of these effects remains insufficiently substantiated by scientific evidence. Moreover, dark chocolate has a high energy content, making portion control important.
Legal Regulations and Standards
The classification and labeling of dark chocolate are conducted according to minimum cocoa solids content standards set by various food safety authorities. Guidelines published by the FDA require that products labeled as "dark" contain at least 35% cocoa. The European Union mandates a minimum cocoa solids content of 43%.
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Industrial Additives
During production, emulsifiers such as lecithin and Polyglycerol Polyricinoleate (PGPR) may be added to dark chocolate. These additives regulate the viscosity of the chocolate, facilitating the manufacturing process and influencing the product’s mouthfeel and melting characteristics. Lecithin is typically derived from soy or sunflower sources and helps reduce surface tension, thereby improving the flow properties of the chocolate.