Penang - The conference incentive tour guide brought us to Penang's Chocolate & Coffee Museum located @ 22 Leith Street. The brief tour was informative but hardly anything worth the purchase. Original Conching Machine A conche is a surface scraping mixer and agitator that evenly distributes cocoa butter within chocolate, and may act as a 'polisher' of the particles. It also promotes flavor development through frictional heat, release of volatiles and acids, and oxidation.