You don’t need me to tell you this, but chocolate and orange make a damn fine couple – formed between them is an enticing middle ground equidistant from sweet, citrus and bitter. Together they possess something instantly mouth-watering – perhaps it’s the pervasive aroma of orange, combined with the knowledge of incoming cocoa. Whatever the reason, chocolate orange mousse is a fabulous dessert that oozes luxury and decadence from every air pocket, yet it contains a mere five ingredients – one of which is water.