The Taste-Changer, a WIENER patented unit, is designed with a conching and vaporizing effect. It has one of the most important functions in the chocolate production process. The Taste-Changer is a combination of a shear stress device and a very efficient film evaporator.

Hot, dry air and chocolate are intensively brought into contact with one another, causing the moisture, volatile amino acids and off-flavours to be extracted from the mixture. The shear stress device temporarily reduces the viscosity of the mixture, thereby increasing the efficiency of the film vaporizer.