Caldo verde is a traditional soup from northern Portugal, made with potatoes, finely sliced leafy greens, olive oil, and smoky chouriço. Its creamy potato base and tender ribbons of greens make a simple, satisfying bowl, and Portuguese households vary the greens, sausage, and thickness to suit local ingredients and taste.
Ingredients
- 1½ lb (680 g) floury potatoes, such as russets, peeled and cut into 1-inch (2.5 cm) pieces
- 1 medium yellow onion, about 7 oz (200 g), peeled and roughly chopped
- 3 garlic cloves, about 9 g, peeled and chopped
- 6 cups (1.4 L) low-sodium chicken or vegetable broth
- 2 cups (475 ml) water, plus more if needed
- 1 teaspoon (5 g) fine salt, plus more to taste
- ¼ teaspoon (1 g) freshly ground black pepper
- 2 tablespoons (30 ml) olive oil, plus extra for serving
- 8 oz (225 g) collard greens or kale, tough stems removed and leaves sliced very thinly
- 6 oz (170 g) fully cooked smoked Portuguese chouriço, sliced into thin rounds
- 1 bay leaf
- 1 tablespoon (15 ml) lemon juice, optional, for serving
Instructions
- Prepare the vegetables. Peel and cut the potatoes, chop the onion and garlic, and remove the tough stems from the greens. Stack the leaves, roll them into a loose bundle, and slice across into very fine ribbons; thin slices soften quickly and are characteristic of the soup. Slice the chouriço into rounds. If using kale instead of collards, remove any especially thick ribs so the greens cook evenly.
- Brown the chouriço. Heat a large, heavy pot or Dutch oven over medium heat. Add the sausage rounds and cook for 4 to 5 minutes, turning once, until lightly browned and fragrant. Transfer them to a plate, leaving a little rendered fat in the pot. If your fully cooked sausage releases very little fat, add a teaspoon of the measured olive oil. If substituting uncooked pork sausage, cook it through to 160°F (71°C), the USDA FSIS safe minimum for ground meat, before setting it aside.
- Soften the aromatics. Add the remaining olive oil to the pot, followed by the onion. Cook for 4 to 5 minutes, stirring occasionally, until softened but not deeply browned. Stir in the garlic and cook for about 30 seconds, just until fragrant. Browning the onion too heavily can give the pale soup a sweeter, darker flavor than intended.
- Simmer the potatoes. Add the potato pieces, broth, water, bay leaf, salt, and black pepper. Bring the liquid to a boil, then lower the heat so it simmers steadily. Partially cover the pot and cook for 20 to 25 minutes, stirring once or twice, until the potatoes are very tender and break apart easily when pressed with a spoon. If the liquid drops below the potatoes before they soften, add a little hot water.
- Make the potato base. Remove and discard the bay leaf. Use an immersion blender to puree the potatoes and cooking liquid until smooth, keeping the blender head submerged to avoid splashing. Alternatively, transfer the mixture in batches to a countertop blender, taking care not to fill it more than halfway with hot liquid and venting the lid according to its instructions. For a more rustic soup, mash the potatoes thoroughly with a masher instead. Add water or broth a little at a time if the base is thicker than you like.
- Cook the greens. Bring the pureed soup back to a gentle simmer. Stir in the sliced greens and cook uncovered for 8 to 10 minutes, stirring now and then, until they are tender but still vivid in color. A rolling boil can dull their color and make the texture less pleasant, so keep the heat moderate. Taste the broth before adding more salt, especially if the sausage or broth is salty.
- Finish and serve. Stir most of the browned chouriço into the pot and simmer for 1 minute to warm it through. Ladle the soup into warm bowls, divide the remaining sausage over the top, and finish with a small drizzle of olive oil. Offer lemon juice at the table for anyone who likes a brighter flavor. The soup should be thick enough to coat a spoon but loose enough to eat easily; adjust it with a splash of hot water if needed.
Tips
- Slice the greens very thinly. Portuguese couve-galega, a traditional leafy cabbage, may be difficult to find outside Portuguese markets. Collard greens are a practical substitute with a similar sturdy texture; curly kale works too, though its flavor is a little more pronounced. Remove tough ribs and cut the leaves into fine ribbons so they soften in the short simmer.
- Choose sausage with care. Portuguese chouriço is a seasoned, smoked sausage that gives caldo verde its familiar savory aroma. Spanish chorizo is a reasonable substitute, but it is often more paprika-forward and can color the broth orange. Use fully cooked smoked sausage for this timing; raw sausage needs to be cooked safely before it is added.
- Keep the puree smooth without over-thickening. Floury potatoes make a naturally creamy base, but they absorb liquid as the soup sits. Start with the listed broth and water, then thin the finished soup with hot water or broth rather than adding extra oil. If using a regular blender, work in small batches because hot soup expands when blended.
- Season in stages. Broth and chouriço can both contain substantial salt. Begin with the measured teaspoon, taste after the greens have cooked, and adjust at the end. A drizzle of olive oil adds aroma, while a little lemon at serving time brightens the bowl without changing the traditional soup itself.
Serving Suggestions
Serve caldo verde hot as a first course or as a light main meal. A slice or two of crusty bread is useful for soaking up the potato-rich broth, and a simple green salad makes a fresh counterpoint if the soup is the center of dinner. The sausage makes each bowl savory and substantial, so elaborate side dishes are unnecessary.
For a Portuguese-inspired spread, place a small bottle of olive oil and a dish of sliced chouriço on the table so guests can add a little more to their bowls. If you want a sharper contrast, serve lemon wedges on the side rather than stirring lemon juice into the whole pot. A modest portion of soup also works well before grilled fish, roast chicken, or another uncomplicated main course.
Variations
The defining idea is a smooth potato base with finely cut greens, not a single fixed list of ingredients. In Portugal, the exact greens and sausage can vary by place and household. Use traditional couve-galega when it is available; collards are closer in texture than tender spinach, which wilts too quickly to give the soup its familiar ribbons. You can use kale for a slightly earthier taste, or combine collards and kale if you have small amounts of both.
For a meat-free bowl, leave out the chouriço and use vegetable broth. Add a teaspoon of smoked paprika to the onion as it softens for a gentle smoky note, understanding that paprika is a substitute rather than a traditional replacement for the sausage. For a lighter soup, reduce the sausage to 3 oz (85 g) and use it as a garnish. For a chunkier texture, mash rather than blend the potatoes, or reserve a cup of cooked potato pieces and stir them back into the pureed base.
Storage and Reheating
Cool leftovers promptly and refrigerate them within 2 hours of cooking in a covered container. Caldo verde keeps for 3 to 4 days in the refrigerator. The potatoes continue to absorb liquid as the soup chills, so the next-day batch may be much thicker; loosen it with a few tablespoons of water or broth while reheating.
Reheat only the portion you plan to eat in a saucepan over medium-low heat, stirring frequently until it is steaming throughout and reaches 165°F (74°C), the USDA FSIS temperature for reheated leftovers. Avoid a hard boil, which can make the greens look dull and break down the sausage. In a microwave, cover the bowl loosely, heat in short intervals, and stir between intervals so there are no cool spots. For longer storage, freeze the soup in airtight containers for up to 2 months for best quality. Thaw it overnight in the refrigerator and reheat to 165°F (74°C); the greens may be softer after freezing, but the flavor remains suitable for a quick 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 green leaves stirred into the potato base. The soup is associated with northern Portugal, especially the Minho region, and is now enjoyed in many parts of Portugal and in Portuguese communities elsewhere.
Can I make caldo verde without an immersion blender?
Yes. Mash the cooked potatoes directly in the pot for a rustic texture, or carefully blend the broth and potatoes in batches in a countertop blender. Letting the soup cool before blending is another option, but it adds cooling and reheating time and is not included in the recipe timing. Follow your blender’s instructions for hot liquids and do not seal a hot mixture in an unvented jar.
Can I use spinach instead of collards or kale?
You can, but the result will be softer and less like the traditional version. Spinach cooks in only a few minutes and tends to lose its shape, so stir it in near the end and cook just until wilted. If you use spinach, keep some collards or kale in the mix when possible for the thin, tender ribbons that give the soup more texture.
Why is my soup too thick?
Potatoes absorb liquid as they cook and continue to thicken the soup after blending, especially as it cools. Stir in hot water or broth a little at a time until it reaches the consistency you prefer. Taste again after thinning, since added liquid can reduce the apparent saltiness. Avoid adding extra oil to loosen it; liquid is the better adjustment.
Can I prepare the soup ahead?
Yes. You can cook the potato base a day ahead, refrigerate it promptly, and add the greens and sausage while reheating so their texture stays fresher. If you make the entire soup ahead, it will keep refrigerated for 3 to 4 days, but the greens soften and the broth thickens. Reheat leftovers to 165°F (74°C) and thin with hot broth or water as needed.
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