The perfect pisco sour?
Peruvian or Chilean, that’s the question. Each nation fiercely contends its version is the superior tipple. Whoever’s right, raise a glass to a (literally) bitter rivalry by trying one, or several, of these punchy concoctions. Pisco (a grape brandy), lemon juice, sugar and egg white, all shaken with ice make up the zesty cocktail that’s as much an icon of Peru as Machu Picchu. The smart little bars that dot Cusco’s arty enclave of San Blas are the ideal test-site for discovering the perfect version of your newest favourite drink