Switzerland-based Barry Callebaut is the world's biggest chocolate producer making supplying 1,000 tonnes of chocolate a day to companies like Nestlé, Hershey's, Leonidas and Neuhaus. But chocolate's raw material is cocoa which is mainly sourced from countries like Côte d'Ivoire and Mali - places not well-known for their human rights record. Robert Kotuszewski, Managing Director of Barry Callebaut in Malaysia talks to us about walking that balance between ensuring the confection they produce is ethical, sustainable and profitable.