Caldo verde

Portuguese kale and potato soup: the national soup of Portugal, always served with broa de milho, and the dish that made corn bread the essential companion of the Portuguese table

Origin: Minho, Northern Portugal

From the journey of Corn.

Caldo verde, 'green broth', is the most loved soup in Portugal. It originates in the Minho, the wet, green province of northwestern Portugal, where the same cool, rainy climate that made broa de milho (corn bread) the bread of the region also produced the couve galega: a tall, dark-leafed kale variety that grows through winter. The two are inseparable: caldo verde is always served with broa, torn and dipped into the soup, its dense corn crumb drinking up the golden, silky potato broth. The soup's arrival at corn's table is not incidental; it was the adoption of corn into the Minho's agricultural landscape in the 16th century that produced broa, and broa gave caldo verde its perfect companion. Without corn, caldo verde would be a different dish. Caldo verde is eaten at every occasion in Portugal: at baptisms and weddings, at the Festas de São João in Porto, at weeknight dinners and Sunday lunches. The New Yorker once called it the soup that best represents a nation. It is as simple as great food gets: potatoes, olive oil, water, and dark kale, enriched with rounds of chouriço.

Ingredients

Soup

  • 800 g floury potatoes, peeled and roughly chopped
  • 1 medium white onion, roughly chopped
  • 3 cloves garlic, peeled
  • 1.5 litres water
  • 80 ml good extra virgin olive oil, plus more to finish
  • 200 g chouriço (Portuguese), sliced into rounds
  • 250 g couve galega or cavolo nero or Savoy kale, very finely shredded
  • 1.5 tsp fine salt, plus more to taste

To serve

  • 4 thick slices broa de milho (Portuguese corn bread), to serve

Method

  1. Combine the potatoes, onion, garlic, olive oil, and water in a large pot. Add the salt and bring to a boil. Cook for 20 minutes until the potatoes are completely tender.
  2. Use a stick blender or potato masher to blend the soup completely smooth. The texture should be silky and thick: a true purée, not chunky. If it seems too thick, add a little hot water.
  3. Add half the chouriço slices to the soup and bring back to a simmer. The sausage flavours and colours the broth.
  4. The kale must be cut into very fine ribbons; as thin as possible. Stack the leaves, roll tightly, and slice as finely as you can. Add to the soup and cook for exactly 3–4 minutes; no more. The kale should be just tender but still vivid green.
  5. Ladle into bowls. Add the reserved chouriço slices on top. Drizzle generously with olive oil. Serve immediately with thick slices of broa de milho.

Notes

Couve galega (Galician kale) is the traditional variety; tall, dark green, and slightly bitter. Cavolo nero (Tuscan kale) or Savoy cabbage are good substitutes; standard curly kale works but is less silky. The key to the soup's texture is using floury potatoes that break down completely. Chouriço can be replaced with linguiça or, for a vegetarian version, omitted entirely with an extra generous pour of olive oil to compensate. In Porto, caldo verde is eaten at the Festas de São João on June 23rd: the summer festival; with sardines grilled on the street.

The Gastrographer

The Gastrographer

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