Portuguese vegetarian caldo verde is a comforting soup of potatoes, thinly sliced greens, olive oil, and white beans, inspired by the classic from northern Portugal. This meat-free version keeps the silky potato base and bright greens, while beans make it a satisfying bowl on its own.
Ingredients
- 2 tablespoons (30 ml) extra-virgin olive oil, plus more to finish
- 1 medium yellow onion (about 150 g), finely chopped
- 4 garlic cloves (about 12 g), minced
- 1/2 teaspoon (1 g) smoked paprika, optional
- 1 1/2 pounds (680 g) Yukon Gold or russet potatoes, peeled and cut into 1/2-inch (1.25 cm) pieces
- 6 cups (1.42 L) vegetable broth, preferably low-sodium
- 1 bay leaf
- 1 teaspoon (5 g) fine salt, plus more to taste
- 1/4 teaspoon (0.5 g) freshly ground black pepper
- 1 can white beans, 15 ounces (425 g), drained and rinsed; this is about 1 1/2 cups (255 g) beans
- 8 ounces (225 g) collard greens, kale, or Portuguese couve, tough stems removed and leaves sliced very thinly
- 1 tablespoon (15 ml) red wine vinegar, optional
Instructions
- Prepare the vegetables. Finely chop the onion and garlic, peel and dice the potatoes, and remove the thick stems from the greens. Stack a few leaves at a time, roll them into a loose cylinder, and slice crosswise into very thin ribbons. Thin slicing matters: the greens should soften quickly and mingle with the soup rather than remain in bulky pieces. This preparation takes about 20 minutes, depending on your knife speed.
- Soften the onion. Warm the olive oil in a large, heavy-bottomed pot over medium heat. Add the onion and cook for 7 minutes, stirring every minute or two, until soft and translucent but not browned. If the onion starts sticking, lower the heat and add a spoonful of broth rather than more oil.
- Add the aromatics and potatoes. Stir in the garlic and smoked paprika, if using, and cook for about 30 seconds, just until fragrant. Add the potatoes, broth, bay leaf, salt, and pepper. Stir, scraping the bottom of the pot to lift any onion that has stuck, then bring the broth to a gentle boil. Reduce the heat and simmer uncovered for 19 minutes, or until a fork slips easily through the largest potato pieces. Keep the simmer steady rather than vigorous so the broth does not reduce too quickly.
- Make the potato base. Remove the bay leaf. Turn off the heat and blend the soup with an immersion blender for about 3 minutes, moving the blender around the pot until the potatoes create a mostly smooth, creamy base. Leave a little texture if you prefer. If using a countertop blender, work in small batches, fill it no more than halfway, and vent the lid according to the manufacturer’s instructions; hot liquid expands as it blends. Return the soup to the pot.
- Add the beans and greens. Stir in the rinsed beans and sliced greens. Bring the soup back to a gentle simmer and cook for 7 minutes, stirring occasionally, until the greens are tender but still green and the beans are hot. Very mature collards may need a few extra minutes; taste a ribbon to check instead of relying only on its color.
- Season and serve. Remove the pot from the heat and taste the broth. Add more salt or pepper as needed, and stir in the vinegar if the soup tastes especially rich or flat. Ladle into warm bowls and finish each serving with a small drizzle of olive oil. The soup should be thick enough to coat a spoon but still easy to ladle; add a splash of hot broth or water if it has become thicker than you like.
Tips
- Slice the greens very finely. Thin ribbons are a signature feature of caldo verde and cook evenly in a few minutes. If you are using kale, remove woody stems; tender baby kale can be sliced and added near the end because it wilts faster.
- Choose potatoes for the texture you want. Yukon Gold potatoes make a naturally creamy base, while russets break down more readily and give a softer, thicker soup. Avoid waxy small potatoes if you want the broth to blend smoothly, though they can still be used if you mash them thoroughly.
- Adjust the smoked flavor thoughtfully. Traditional versions commonly include Portuguese chouriço, which this recipe leaves out. Smoked paprika gives a gentle smoky note, but it is optional and does not exactly reproduce sausage flavor. For a less smoky soup, omit it and rely on good olive oil and black pepper.
- Keep the greens separate until the potato base is ready. Blending the greens can turn the soup an uneven color and lose the characteristic ribbons. Add them after blending, and stop cooking once tender so they do not become dull and overly soft.
Serving Suggestions
Serve caldo verde hot as a light main course or as the opening course of a Portuguese-inspired meal. A thick slice of crusty country bread is useful for soaking up the potato-rich broth; toasted bread rubbed lightly with a cut garlic clove is another simple option. If you are serving the soup as part of a larger meal, offer smaller bowls before a vegetable rice dish, roasted seasonal vegetables, or a simple green salad dressed with olive oil and vinegar.
Set extra olive oil, black pepper, and red wine vinegar on the table so everyone can adjust their bowl. A few olives or sliced oranges make easy accompaniments, especially when the rest of the meal is rich. The beans make this version more substantial than a basic potato-and-greens soup, so it can also stand alone with bread for lunch or a relaxed dinner. Serve it in warmed bowls if you want it to stay hot longer; the thick base cools faster in a wide, shallow dish.
Variations
Use Portuguese couve if you can find it. Couve galega, a traditional leafy green used in caldo verde, is not stocked everywhere. Collard greens are a practical substitute because their sturdy leaves hold up well in the hot broth. Kale also works, though its flavor is more assertive and its texture can be slightly firmer. Remove thick stems from either substitute and slice the leaves finely.
Make it without beans. White beans are included here to make the vegetarian soup more filling, but you can leave them out for a version closer to a simple potato-and-greens base. The soup will be less substantial, so serve it with bread or another hearty side. If you leave the beans out, reduce the salt slightly at first and adjust after tasting.
Try another bean or add a little heat. Canned butter beans or cannellini beans can replace the white beans in the same quantity. Their flavor is mild, although butter beans are larger and softer. For a spicy finish, add a pinch of crushed red pepper with the garlic; add it sparingly so it does not overwhelm the greens. A spoonful of extra-virgin olive oil stirred in just before serving gives the soup a rounder finish.
Make it vegan as written. The listed ingredients are plant-based when you choose vegetable broth. Check the broth label, since some prepared broths contain animal-derived ingredients. To keep the soup gluten-free, check the broth as well and serve it with gluten-free bread or no bread; the soup itself contains no flour or pasta.
Storage and Reheating
Let the soup cool briefly, then refrigerate it within 2 hours of cooking in shallow, airtight containers. It keeps for 3 to 4 days in the refrigerator. The potato base thickens as it chills, and the greens soften somewhat, but both are normal. If you expect leftovers, you can also cook the base and beans ahead, refrigerate them, then bring the soup to a simmer and add freshly sliced greens shortly before serving for a brighter texture.
Reheat only the portion you plan to eat in a saucepan over medium-low heat, stirring occasionally and adding a little water or broth to loosen it. Heat leftovers to 165°F (74°C), checking with a food thermometer. You can also microwave a covered bowl, stirring halfway through and checking the temperature in more than one spot. Avoid boiling it hard, which can break down the greens and make the potato base stick to the pan.
For longer storage, freeze the soup in airtight, freezer-safe containers for up to 2 to 3 months for best quality. Leave a little room at the top for expansion. Thaw it in the refrigerator overnight, then reheat as described. The greens may be softer after freezing, but stirring the soup well and adding a little fresh olive oil can help restore a pleasant texture.
Frequently Asked Questions
Is caldo verde traditionally vegetarian?
Many familiar versions include chouriço or another sausage, while recipes and additions vary between households and regions. This recipe is a meat-free adaptation that keeps the potato-and-greens character and adds white beans. Smoked paprika is optional; it suggests a little smokiness without pretending to be a direct replacement for sausage.
Can I make this soup without a blender?
Yes. Use a potato masher to break down most of the cooked potatoes directly in the pot, leaving some small pieces for texture. The broth will be less velvety than a blended version, but it will still thicken as the potatoes release starch. Mash before adding the greens so the leaves remain in distinct ribbons.
Can I use frozen greens?
Yes, although they will not have quite the same fresh, ribbon-like texture. Thaw them and squeeze out excess water before adding, then simmer just long enough to heat them through. Because frozen greens are often already chopped, add them gradually and check the soup after a few minutes to avoid overcooking.
Why is my caldo verde too thick?
Potatoes absorb liquid as the soup sits, especially overnight. Stir in hot water or vegetable broth a little at a time while reheating until it reaches a ladleable consistency, then taste and adjust the salt. Add liquid gradually: too much at once can make the broth thin before the potatoes and beans are evenly mixed through.
Can I prepare it ahead for guests?
Yes. Make the potato base and beans up to a day ahead, cool and refrigerate them promptly, then reheat and add the sliced greens shortly before serving. This keeps the greens fresher in appearance. If you prepare the whole soup ahead, it is still good; expect softer greens and a thicker base, and loosen it with broth when reheating.
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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