The basic traditional ingredients for caldo verde are potatoes, kale and chorizo In Portugal, caldo verde is typically consumed during Portuguese celebrations, such as weddings, birthdays, and popular celebrations. For example, the St. John festival, in Braga or Porto. It is sometimes consumed before a main course meal or as a late supper.
Caldo verde originated from the Minho Province in northern Portugal. Today, it is a traditional national favourite that has spread across the nation and abroad, especially to places where a large community of Portuguese immigrants have settled such as Brazil, Massachusetts, New Jersey, and Rhode Island. References to the soup appear in many novels by Camilo Castelo Branco.