Sweet Diablo is a secret little European café tucked amongst fast-food restaurants in central D.C. The owners, raised in Portugal, have added a Portuguese twist to typical café and bakery fare. And this is the only location in the US to serve "The Best Chocolate Cake in the World," a flourless and gluten-free creation by Chef Carlos Braz Lopes that has been franchised in Spain, Australia, and Brazil.
Illy coffee is brewed alongside freshly baked bread and pastries such as natas—custard tarts dating back to 1837 Lisbon. On the savory side, you'll find tasty croissants and paoninis—a fusion of Italian and Portuguese meats and cheeses on ciabatta. It is a delightful spot for a tasty treat while wandering the surrounding neighborhoods of Georgetown, Dupont Circle, and Foggy Bottom.