Caldo verde is a beloved soup from northern Portugal, usually made with potatoes, thinly sliced greens, olive oil, and smoky Portuguese chouriço. This home-style version blends some of the potatoes into the broth for a comforting, creamy texture while leaving the kale and sausage distinct; families and regions make it in their own ways.
Ingredients
- 2 tablespoons (30 ml) extra-virgin olive oil, plus 1 tablespoon (15 ml) for serving if desired
- 1 medium yellow onion, finely chopped, about 1 cup (170 g)
- 3 garlic cloves, minced, about 1 tablespoon (9 g)
- 1½ pounds (680 g) floury potatoes, such as russets, peeled and cut into ½-inch (1.25 cm) cubes
- 6 cups (1.4 L) low-sodium chicken or vegetable broth
- 2 cups (475 ml) water, plus a little more if needed
- 1 bay leaf (1 leaf)
- ½ teaspoon (3 g) fine salt, plus more to taste
- ¼ teaspoon (0.5 g) freshly ground black pepper, plus more to taste
- 8 ounces (225 g) collard greens or kale, tough stems removed and leaves sliced into very fine ribbons, about 8 loosely packed cups
- 6 ounces (170 g) fully cooked, cured Portuguese chouriço, thinly sliced
- 1 tablespoon (15 ml) red wine vinegar, optional, for finishing
Instructions
- Prepare the greens and vegetables. Wash the collards or kale carefully, since grit can collect in the leaves, and dry them well. Remove thick stems, stack the leaves, roll them tightly, and slice across the roll into very fine ribbons. Finely chop the onion, mince the garlic, and cut the peeled potatoes into evenly sized cubes so they become tender at roughly the same time. This preparation takes about 20 minutes; keep the greens separate from the potatoes.
- Soften the onion. Warm 2 tablespoons (30 ml) olive oil in a large, heavy soup pot over medium heat. Add the onion and cook for about 7 minutes, stirring occasionally, until soft and translucent but not deeply browned. If it starts catching on the bottom, lower the heat and add a tablespoon of water rather than letting it scorch.
- Add the garlic, potatoes, and broth. Stir in the garlic and cook for 1 minute, just until fragrant. Add the potato cubes, broth, water, bay leaf, salt, and pepper. Bring the liquid to a boil, then lower the heat to maintain a steady simmer. Partially cover the pot and simmer for about 25 minutes, stirring once or twice, until a fork passes easily through the largest potato pieces. If the liquid drops below the potatoes before they are tender, add a splash of water.
- Brown the chouriço while the potatoes simmer. During the final 5 minutes of the potato simmer, warm a small skillet over medium heat. Add the sliced cured chouriço in a single layer and brown it for about 2 to 3 minutes per side, until the edges are lightly crisp and its paprika-scented fat has rendered. Set the sausage aside and keep the rendered fat; it can be spooned over the soup for a deeper smoky flavor. Portuguese cured chouriço is ready to eat and is being warmed here. If substituting uncooked ground pork sausage, cook it separately to 160°F (71°C), the USDA FSIS safe minimum internal temperature for ground meat, checked with a food thermometer.
- Blend the potato base. Remove and discard the bay leaf. Use an immersion blender to blend the potatoes and broth until mostly smooth, leaving a little texture if you like. Alternatively, carefully transfer about two-thirds of the soup to a blender, blend until smooth, and return it to the pot. Work in batches if needed, vent the blender lid to release steam, and hold the lid in place with a folded towel. The blended potatoes thicken the soup without needing cream.
- Cook the greens. Return the pot to a gentle simmer and stir in the finely sliced greens. Cook uncovered for about 5 minutes, stirring so the ribbons separate and soften. Collards may need a few extra minutes; kale often softens sooner. The greens should be tender but still green, not dull and overcooked. Stir in the browned chouriço and any desired rendered fat, then taste the broth and adjust the salt and pepper.
- Finish and serve. Stir in the optional red wine vinegar if you want a brighter finish. Ladle the soup into warm bowls and drizzle with the remaining olive oil. Serve while hot, with bread for dipping. The soup thickens as it stands, so stir in a little hot water or broth if you prefer a looser consistency.
Tips
- Slice the greens very thinly. Fine ribbons are a defining feature of caldo verde: they soften quickly and distribute evenly through each spoonful. A sharp knife works well, or use a food processor’s slicing blade. Dry leaves before slicing so they do not slip, and take care to keep fingers clear of the blade.
- Choose the right sausage substitute. Portuguese chouriço is a cured, seasoned sausage with a distinctive paprika-rich flavor. If it is hard to find, Spanish-style cured chorizo is a practical substitute and gives the soup a similar smoky color, though its seasoning may be sharper. Kielbasa is milder and less paprika-forward, so add a small pinch of smoked paprika if using it. Avoid fresh Mexican chorizo as a direct swap: it is uncured, crumbly, and often more heavily seasoned, so cook it fully in a skillet before adding it.
- Control the thickness with the potatoes. Russets break down readily and make a thick, soft base; Yukon Gold potatoes give a slightly silkier texture and may leave more small pieces behind. If the finished soup seems too thick, loosen it with hot broth or water a few tablespoons at a time. If it is too thin, simmer it uncovered for several minutes before adding the greens, so they do not overcook while the broth reduces.
- Season in stages. Cured sausage and packaged broth can both be salty. Start with the stated salt, then taste after the chouriço is stirred in and adjust at the end. A little vinegar or a drizzle of olive oil can balance the bowl, but neither is essential; let the saltiness and richness of your particular ingredients guide the final seasoning.
Serving Suggestions
Serve caldo verde as a starter before a larger Portuguese-style meal or make it the main course with generous portions and bread. Crusty country bread, a simple baguette, or cornbread can all be used to mop up the broth, though bread is not part of the soup itself. For a fuller meal, offer a green salad dressed with olive oil and vinegar, or serve the soup alongside grilled fish or roasted vegetables.
Bring the pot to the table while it is hot and let everyone add olive oil or black pepper to taste. A small amount of the browned sausage fat gives the surface a savory sheen, while an extra drizzle of good olive oil gives a fresher finish. If serving the soup as a first course, keep the bread and sausage portions modest so the bowls do not feel too heavy before the next dish.
Variations
Caldo verde has many household and regional versions, so this recipe is a starting point rather than a claim that there is one fixed formula. Some cooks leave the potatoes whole and mash them instead of blending, creating a more rustic broth. Others blend nearly everything for a smoother base. Adjust the amount of greens to suit your preference, but keep them finely sliced so they cook quickly and remain easy to eat with a spoon.
For a vegetarian version, use vegetable broth and omit the chouriço. Add a little smoked paprika to the softened onions, then finish with extra olive oil; the soup will be less smoky and will not have the sausage’s richness, but the potato and greens remain the focus. For a milder bowl, use less chouriço and serve extra slices separately. If collards are unavailable, curly kale or lacinato kale works well; spinach can be used in a pinch, though it wilts faster and has a softer texture, so stir it in for only a minute or two at the end.
Storage and Reheating
Let the soup stop steaming heavily, then transfer it to shallow, covered containers and refrigerate within 2 hours of cooking. Properly refrigerated, it keeps for 3 to 4 days. The potatoes absorb broth as the soup rests, so expect it to thicken; stir in water or broth when reheating. For the best texture, store the sausage separately if you know you will have leftovers, since it is more likely to soften in the soup overnight.
Reheat a serving in a saucepan over medium-low heat, stirring occasionally, until it is steaming throughout. Reheat leftovers to 165°F (74°C), checked with a food thermometer. Add a splash of broth or water as needed, and avoid a hard boil, which can break down the greens and make the soup feel overly starchy. You can freeze the soup in airtight freezer-safe containers for about 2 to 3 months for best quality; leave room for expansion and thaw it in the refrigerator before reheating. The greens may be softer after freezing, but the soup remains suitable for a simple meal.
Frequently Asked Questions
What does caldo verde mean?
Caldo verde translates from Portuguese as “green broth” or “green soup.” The name refers to the greens that give the soup its color. It is widely associated with northern Portugal, particularly the Minho region, and is now served in many parts of the country in versions that vary by household.
Can I make caldo verde without a blender?
Yes. Mash the cooked potatoes against the side of the pot with a potato masher, or remove some potatoes, mash them in a bowl, and return them to the broth. The result will be more rustic and less uniform than a blended soup, but it will still thicken the broth. Avoid trying to mash the raw potato pieces before they are fully tender.
Can I make it ahead?
Yes. Make the potato base a day ahead and refrigerate it promptly, ideally keeping the sliced greens and browned sausage separate. Reheat the base, then add the greens and cook until tender before stirring in the sausage. This approach helps the greens keep their color and texture. If the soup is already fully assembled, it is still fine to reheat; simply expect softer greens and a thicker consistency.
Which greens are closest to the traditional version?
Portuguese recipes commonly use couve, a type of leafy cabbage or collard-like green, cut into very fine strips. It can be difficult to find outside Portuguese markets, so collard greens are a useful substitute, with kale also widely available and easy to prepare. The flavor will vary slightly, but both work well. Remove tough ribs and slice the leaves thinly so they soften in the short cooking time.
Why is my soup too thick the next day?
Potatoes continue to absorb liquid while the soup cools and sits, so a thicker texture is normal. Warm it gently with a few tablespoons of water or broth, stir, and add more until it reaches the consistency you want. Taste again after thinning, because added liquid can also dilute the seasoning.
Can I leave out the chouriço?
Yes. The soup is still satisfying without sausage, especially if you use a flavorful broth and finish with olive oil. For a smoky note, stir a small pinch of smoked paprika into the onions as they soften. Add it sparingly so it supports rather than overwhelms the mild potato and greens.
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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes
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