Caldo verde is a traditional Portuguese potato-and-greens soup, usually served with thin slices of chouriço and a drizzle of olive oil. Its short ingredient list and forgiving method make it a welcoming first Portuguese recipe: the potatoes thicken the broth, while finely cut greens cook quickly right at the end.
Ingredients
- 2 tablespoons (30 ml) extra-virgin olive oil, plus a little more for serving
- 1 medium yellow onion, about 5 ounces (150 g), finely chopped
- 2 garlic cloves, about 6 g, finely chopped
- 2 pounds (900 g) Yukon Gold or other floury potatoes, peeled and cut into ½-inch (1.25 cm) pieces
- 6 cups (1.4 L) low-sodium chicken or vegetable broth
- 2 cups (475 ml) water
- 8 ounces (225 g) collard greens, tough ribs removed, rolled and sliced very thinly; curly kale is an easy substitute
- 6 ounces (170 g) fully cooked, smoked Portuguese chouriço, thinly sliced
- ¾ teaspoon (4 g) fine salt, plus more to taste
- ¼ teaspoon (0.5 g) freshly ground black pepper, plus more to taste
Instructions
- Prepare the greens and sausage. Wash the collards well, shake off excess water, and remove the thick center ribs. Stack a few leaves, roll them into a loose bundle, and slice them as finely as you can; narrow strands soften evenly and are easier to eat in a spoonful of soup. Slice the fully cooked chouriço into thin rounds. If you are using kale instead, remove its woody stems before slicing.
- Soften the onion and garlic. Warm the olive oil in a large heavy-bottomed pot over medium heat. Add the onion and cook for about 6 minutes, stirring now and then, until soft and translucent but not browned. Stir in the garlic and cook for 1 minute. If the garlic starts to darken, lower the heat; browned garlic can make the broth taste bitter.
- Simmer the potatoes. Add the potatoes, broth, water, salt, and pepper. Bring the liquid to a boil, which usually takes about 4 minutes, then reduce the heat to maintain a steady simmer. Cook uncovered for about 18 minutes, stirring once or twice, until a fork passes easily through the largest potato pieces. If the pot boils hard, lower the heat so the potatoes soften without breaking apart before they are tender.
- Make the potato base. Take the pot off the heat. Use an immersion blender to purée the soup until mostly smooth, leaving a little texture if you prefer. Move the blender around the pot rather than holding it in one place, and keep the blade fully submerged to prevent splashes. If using a countertop blender, work in small batches, vent the lid, and hold it with a folded towel; hot soup expands as it blends. Return the purée to the pot.
- Cook the greens and warm the chouriço. Bring the soup back to a gentle simmer and stir in the sliced greens. Cook for 5 minutes, then add the chouriço and simmer for 3 minutes more, until the greens are tender but still green and the sausage is hot. Taste a piece of potato and a spoonful of broth before adding more salt; chouriço and broth can both be salty. If using raw fresh pork sausage instead of cooked chouriço, cook it separately until its center reaches 160°F (71°C), the USDA FSIS safe minimum for ground meat, before adding it to the soup.
- Adjust and serve. Check the consistency. For a thicker soup, simmer uncovered for a few extra minutes; for a looser bowl, stir in hot water a little at a time. Taste once more for salt and pepper, ladle into warm bowls, and finish with a small thread of olive oil.
Tips
- Slice the greens very thinly. Caldo verde is known for fine ribbons of greens rather than large leafy pieces. A sharp knife makes this easier, but you can also use kitchen scissors to cut the leaves into narrow strips. Thick collard ribs stay tough, so remove them rather than trying to blend them into the soup.
- Choose the right potato texture. Yukon Gold potatoes give the soup a creamy, slightly buttery base; russets break down readily and make it thicker. Waxy red potatoes hold their shape, so they are less suitable if you want the traditional smooth body. If your soup becomes too thick after blending, add broth or hot water gradually.
- Know your chouriço options. Portuguese chouriço is a smoked, seasoned sausage that may be sold in specialty shops. Fully cooked smoked chouriço is convenient here; Spanish-style cooked chorizo can stand in, though its seasoning and smoke level will change the flavor. If you use raw fresh sausage, cook it completely before it goes into the soup, as described in the instructions.
- Season at the end as well as the beginning. Broths and sausages vary in saltiness, and simmering concentrates their flavor. Start with the measured salt, then taste after the sausage has warmed through. Avoid a rolling boil after blending: a gentle simmer keeps the purée smooth and helps prevent splashes.
Serving Suggestions
Serve caldo verde as a first course or as a simple supper with crusty bread for dipping. A loaf of Portuguese broa, a rustic corn-and-wheat bread, is a traditional partner where available; a country loaf or warm rolls are practical alternatives. Set out olive oil and black pepper so everyone can finish their bowl to taste. Since the soup already contains potatoes and sausage, a small salad of lettuce, tomato, or sliced onion can make the meal feel complete without competing with its savory broth.
For a family-style meal, keep the pot on very low heat and ladle the soup into warmed bowls just before serving. The greens can continue softening if the soup sits hot for a long time, so avoid leaving it at a simmer while everyone takes their first helping. If you are serving bread, slice it just before the meal so it stays fresh rather than drying out on the table.
Variations
Make it vegetarian: Use vegetable broth and leave out the chouriço. Add a pinch of smoked paprika to the onions if you want a gentle smoky note, but use a small amount so it does not overpower the potatoes. You can also serve the soup with a drizzle of olive oil and a few toasted bread cubes instead of sausage.
Use different greens: Collards are a good stand-in for Portuguese couve, a traditional leafy green that can be difficult to find outside Portugal. Kale is widely available and holds its shape well; Swiss chard also works, though its leaves soften faster and have a milder flavor. Add chard stems a few minutes before the leaves if you want to use them, since they take longer to become tender.
Make it chunkier or silkier: For a rustic texture, mash some of the potatoes against the side of the pot with a spoon instead of blending the whole base. For a very smooth soup, blend the potatoes thoroughly before adding the greens. A common home-style approach is somewhere between those two: mostly creamy broth with a few small potato pieces.
Adjust the sausage garnish: Use more or less chouriço to suit your table, or serve the slices in a separate dish for guests to add themselves. This keeps the soup flexible for people who prefer a meat-free bowl while retaining the smoky garnish for others. Portuguese households and regions have their own preferences for the balance of greens, potato, and sausage, so the proportions can be adjusted without changing the basic method.
Storage and Reheating
Cool leftover soup promptly and refrigerate it within 2 hours of cooking, in a covered container. It keeps for 3 to 4 days in the refrigerator. The greens will soften as they sit, and the potato base may thicken, so stir in a splash of water or broth when reheating. Reheat only the portion you plan to eat, stirring on the stovetop over medium-low heat until steaming throughout; leftovers should reach 165°F (74°C) when checked with a food thermometer.
You can freeze the soup for about 2 to 3 months for best quality. The potatoes may become a little grainy and the greens softer after thawing, but the soup remains useful for a quick meal. Freeze it in meal-size portions, thaw overnight in the refrigerator, and reheat gently to 165°F (74°C), adding broth or water to restore a spoonable consistency. Avoid leaving the soup at room temperature to cool for an extended period.
Frequently Asked Questions
What does caldo verde mean?
Caldo verde translates roughly as green broth or green soup in Portuguese. The name refers to the leafy greens that give the finished soup its characteristic green ribbons. It is associated with Portugal, though the exact balance of potato, greens, and sausage varies between cooks and regions.
Can I make caldo verde without an immersion blender?
Yes. Mash the potatoes in the pot with a potato masher for a rustic result, or carefully blend the soup in batches in a countertop blender. Do not fill the blender more than halfway with hot liquid, and leave a way for steam to escape while holding the lid in place. You can also remove a portion of the potatoes, mash them, and stir them back into the pot.
Which greens are best if I cannot find Portuguese couve?
Collard greens are a particularly useful substitute because their sturdy leaves can be sliced into fine strips and simmered without disappearing. Curly kale is another easy option and has a slightly stronger, more assertive flavor. Remove tough stems from either green and slice the leaves thinly so they cook in the short final simmer.
Can I prepare the soup ahead?
Yes. You can make the potato base a day ahead and refrigerate it promptly, then reheat it and add the greens and chouriço shortly before serving. This keeps the greens brighter and less soft than if they simmer in the soup overnight. If the soup is already fully assembled, it is still fine to store and reheat; expect a softer texture.
Why did my soup turn out too thick?
Potatoes vary in starchiness, and blending releases starch that thickens the broth. Stir in hot water or broth a few tablespoons at a time until it reaches the consistency you like, then taste for salt again because added liquid dilutes the seasoning. Next time, use a slightly waxier potato or blend for less time if you prefer a looser soup.
Can I make this recipe with raw sausage?
Yes, but cook fresh sausage separately before adding it to the pot. Break it into small pieces in a skillet and cook it through, checking the thickest piece with a food thermometer for 160°F (71°C), the USDA FSIS safe minimum for ground meat. Drain excess fat if needed, then stir the cooked sausage into the soup at the end. This gives a more crumbly garnish than slices of smoked chouriço.
Related
- Food in Portuguese: Meaning, Pronunciation & Use
- Caldo Verde: Portuguese Kale and Potato Soup
- Traditional Portuguese Food in Lisbon: Bacalhau à Brás
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