Castroni
Opening its flagship shop near the Vatican in 1932, this gastronomic paradise has long been Rome's port of call for decadent delicacies from around the globe; there are now 13 locations throughout the city. Jonesing expats and study-abroad students pop in for local sweets, 300 types of tea, and even good old-fashioned Betty Crocker red velvet cake mix. If you need a pick-me-up, try the house-roasted espresso, which is some of the best coffee in Rome.
