The test . . . dark chocolate for cooking

Sainsbury’s SO Fairtrade Organic Dark Chocolate £1.32, sainsburys.co.uk Tangily fruity, with citrus notes, this is a great value chocolate with a conscience. Photograph: Guardian Original Beans Cru Virunga from DR Congo £6.85, from La Fromagerie, 020-7935 0341 As used in the Ivy’s chocolate mousse – a dark but delicately floral chocolate. Photograph: Guardian Willie’s Cacao Peruvian 70 £2.99, from Harvey Nichols, Selfridges and willieschocolateshop.com Earthy, rich espresso notes, with a hint of pineapple, this would make a wickedly intense mousse. Photograph: Guardian