Caldo verde Period BOrigin theory CVerified

Caldo verde is a soup from the Minho region of northern Portugal: potato mashed to give it body, thin-sliced green kale (couve), and chouriço simmered together. Its present form was settled in this region from the late eighteenth century onward.

What lends the soup its body and thickness is the potato. This crop crossed from the New World to Europe, and it was in the late eighteenth century that it took root as a staple in northern Portugal, in Trás-os-Montes and elsewhere. The cookbook Cozinheiro Moderno ("The Modern Cook"), written in 1780 by the royal cook Lucas Rigaud, and a 1798 decree by Queen Maria I encouraging its cultivation both attest to how well established the potato had become. Kale was an old vegetable long rooted in the soil, present in kitchen gardens from early on. As the potato joined it in the life of the north, today's smooth caldo verde took shape.

Later, as people migrated from the interior in the nineteenth century, the soup spread to cities such as Lisbon and Porto and grew into something close to a national dish of Portugal. The name of its maker has not come down to us.

Caldo verde carries a story passed down that it was born in the Minho in the mid-fifteenth century. This tale, which boasts of the dish's age, collides with the record when applied straight to today's potato-based form.

The potato was a crop brought from the New World, and it spread as a staple in northern Portugal only in the late eighteenth century. In the fifteenth-century Minho there were as yet no potatoes. A soup thickened with mashed potato, as we know it, could not appear until that crop had settled into the land. Indeed, the royal cook Rigaud's 1780 cookbook Cozinheiro Moderno records the Portuguese table of the day, and the original survives in the National Library of Portugal in Lisbon. The food-history study that read this cookbook closely (João Pedro Gomes, 2016) likewise traces how the potato became established over the late eighteenth century.

Even so, the soup's lineage is not itself new. What can be traced back to the fifteenth century is an earlier green vegetable soup without potato—a plain bowl of kale simmered with grains or bread. The parent dish is old, yet the smooth caldo verde we know today arose in the late eighteenth century, after the potato had rooted in the north. When these two stages are laid over one another, the comforting story of "a fifteenth-century taste carried on unchanged" was born. But the dish changed its shape once the ingredient at its base had arrived.