The process can include mixing ingredients into a cocoa mass, conching the cocoa mass, and, subsequently to conching, measuring viscosity of the conched cocoa mass, contingent upon said viscosity being higher than a target viscosity value, calculating, based on the measured viscosity and reference data representing a reference model of viscosity vs. viscosity-reducing substance content for the chocolate to be produced, a quantity of cocoa butter to be added to the cocoa mass, and adding the quantity of cocoa butter to be added to the cocoa mass.