Great chocolate is a complex mix of science,…

Great chocolate is a complex mix of science, physicists reveal

The science of what makes good chocolate has been revealed by researchers studying a 140-year-old mixing technique.

Scientists have uncovered the physics behind the process – known as conching – which is responsible for creating chocolate’s distinctive smooth texture.

The findings may hold the key to producing confectionary with lower fat content, and could help make chocolate manufacturing more energy efficient.

A team led by the University of Edinburgh studied mixtures resembling liquid chocolate created using the conching process, which was developed by Swiss confectioner Rodolphe Lindt in 1879.

Their analysis, which involved measuring the density of mixtures and how they flow at various stages of the process, suggests conching may alter the physical properties of the microscopic sugar crystals and other granular ingredients of chocolate. Until now, the science behind the process was poorly understood.

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