Offering some of the world’s purest, most passionately produced chocolate, along with some of the best coffee in Lisbon, Bettina & Niccolò Corallo on Rua da Escola Politécnica in the Príncipe Real neighborhood has changed the tastes and habits of many locals. There’s no milk chocolate available at this family-run shop, only dark chocolate. And yet Portuguese chocolate lovers – who have a notorious sweet tooth – will swoon when one mentions Corallo’s products. As for the coffee, area residents now wait until 10 a.m., when the café opens, to have their morning brew here.