Spanish Lentil Soup Recipe: Sopa de Lentejas, Made Simple

Spanish sopa de lentejas is a comforting lentil soup made with vegetables, potatoes, olive oil and paprika, served hot as a main course or a generous first course. Spanish versions vary by region and household; this meat-free one uses a slowly softened vegetable base for a hearty, savory broth without complicated ingredients.

Ingredients

1 lb (450 g) brown or green lentils, picked over and rinsed
2 tablespoons (30 ml) extra-virgin olive oil
1 medium yellow onion (about 150 g), finely chopped
2 medium carrots (about 160 g total), peeled and diced
2 celery ribs (about 100 g total), diced
3 garlic cloves (about 9 g), minced
1 teaspoon (2 g) Spanish smoked paprika, or pimentón
½ teaspoon (1 g) ground cumin, optional
½ cup (120 g) crushed tomatoes or passata
2 medium Yukon Gold or other waxy potatoes (about 350 g total), cut into ½-inch (1.25 cm) cubes
7 cups (1.65 L) vegetable broth, plus up to 1 cup (240 ml) hot water if needed
1 dried bay leaf
1 teaspoon (6 g) fine salt, plus more to taste
¼ teaspoon (0.5 g) freshly ground black pepper
1 tablespoon (15 ml) sherry vinegar or red wine vinegar
¼ cup (15 g) chopped fresh flat-leaf parsley, for serving

Instructions

Prepare the vegetables and lentils. Pick through the lentils to remove any small stones or damaged pieces, then rinse them in a fine-mesh sieve under cool running water. Chop the onion, carrots, celery, garlic and potatoes before you start cooking. Brown or green lentils do not need soaking for this recipe; skipping a soak also makes the cooking time easier to predict.
Soften the aromatic vegetables. Warm the olive oil in a large heavy-bottomed pot or Dutch oven over medium heat. Add the onion, carrots and celery, and cook for 8 minutes, stirring every minute or two. The onion should look translucent and the vegetables should begin to soften, but they do not need to brown. If the base starts sticking, lower the heat and add a tablespoon of water rather than more oil.
Build the paprika and tomato base. Stir in the garlic, smoked paprika and cumin, if using. Cook for about 30 seconds, just until fragrant; paprika can turn bitter if it scorches. Add the crushed tomatoes and cook for about 3 minutes, stirring so the tomato coats the vegetables and loses its raw smell. Spanish pimentón is a smoked paprika with a distinctive rounded aroma. If it is unavailable, ordinary sweet paprika still gives a pleasant soup, though the broth will taste less smoky.
Add the lentils, potatoes and broth. Tip in the rinsed lentils and potato cubes. Pour in the vegetable broth, add the bay leaf, salt and black pepper, and stir well, scraping the bottom of the pot to loosen any browned bits. Bring the liquid to a gentle boil over medium-high heat, which should take about 5 minutes. If your pot is small, use one that holds at least 5 quarts (4.7 L) so the soup can simmer without boiling over.
Simmer until tender. Lower the heat to maintain a steady, gentle simmer, then partially cover the pot. Cook for 38 minutes, stirring every 10 minutes and checking that the lentils remain just covered with liquid. The lentils should be tender but not completely disintegrated, and the potato pieces should be easy to pierce with a fork. If the soup becomes thicker than you like before the lentils are ready, add hot water a little at a time. If the lentils are still firm after 38 minutes, continue simmering and check every 5 minutes; older lentils can take longer.
Finish and adjust. Remove the bay leaf and stir in the vinegar. Taste the broth, then add salt, pepper or another small splash of vinegar as needed. For a thicker, more cohesive soup, mash a few potato pieces and lentils against the side of the pot and stir them back in. For a looser bowl, add some of the reserved hot water. Ladle into bowls and scatter parsley over the top.

Tips

Choose the right lentils. Brown or green lentils hold their shape while becoming tender and are the best fit here. French green lentils may need extra simmering time, while red or yellow split lentils soften much faster and tend to dissolve; if you use them, expect a thicker, smoother soup and begin checking well before the stated cook time.
Keep the simmer gentle. A hard boil can split lentils and break up the potato before the center of the lentils is tender. Once the pot reaches a boil, turn the burner down until small bubbles rise steadily. Stir from the bottom occasionally, especially during the final 15 minutes.
Season in layers, then taste at the end. Broths vary in saltiness, and the vinegar brightens the finished soup in a way that can make the seasoning seem different. Start with the listed salt, add the vinegar after simmering, and make the final adjustment just before serving.
Use a practical paprika substitute. Spanish pimentón may be labeled sweet, bittersweet or hot. Sweet smoked paprika is a dependable choice here. If you only have regular sweet paprika, use it in the same quantity; the soup will still be flavorful, just less smoky. Avoid using a large amount of hot paprika unless you want a distinctly spicy broth.

Serving Suggestions

Serve the soup hot in wide bowls, with crusty bread for dipping and a small dish of extra-virgin olive oil on the table. A green salad with a sharp vinaigrette makes a fresh contrast to the earthy lentils and soft potatoes. For a simple lunch, offer toasted bread rubbed with a cut garlic clove, or add a few olives and sliced tomatoes on the side.

Parsley adds a fresh note, while a little extra sherry vinegar or red wine vinegar at the table lets each person sharpen their own bowl. If the soup has thickened while standing, stir in a splash of hot broth or water before ladling. It can be served as a substantial main dish, or in smaller portions before roasted vegetables, fish or another Spanish-inspired meal.

Variations

Add greens: Stir in 2 packed cups (about 60 g) of chopped spinach during the last 2 minutes of cooking, or add chopped kale during the final 10 minutes so it has time to soften. Greens add color and a fresh, slightly vegetal flavor; check the liquid level because kale can absorb some broth.

Make it vegan: The recipe is already meat-free and dairy-free when made with vegetable broth. Check the broth label, and finish with olive oil rather than butter if you want to keep it plant-based. For a little more body, mash a larger portion of the cooked potatoes and lentils into the broth.

Change the vegetables: Replace one carrot with 1 small red bell pepper (about 120 g), diced and cooked with the onion. It lends a gentle sweetness. You can also add ½ teaspoon (1 g) dried oregano with the paprika, though that gives the soup a more herbal profile than the simple version.

Adjust the texture: For a brothier soup, add hot water or vegetable broth a little at a time after cooking. For a thicker texture, mash some of the lentils and potatoes, or blend 1 to 2 cups (240 to 480 ml) and stir the purée back into the pot. Avoid blending the entire pot unless you specifically want a smooth soup.

Storage and Reheating

Cool leftovers promptly and refrigerate them within 2 hours of cooking in shallow, airtight containers. The soup keeps for 3 to 4 days in the refrigerator. Lentils absorb broth as they sit, so expect the chilled soup to be thicker than it was on the first day. Add a little water or broth when reheating to restore the consistency.

Reheat only the portion you plan to eat in a saucepan over medium-low heat, stirring occasionally until steaming throughout, or use a microwave-safe bowl and stir midway through heating. USDA FSIS guidance is to reheat leftovers to 165°F (74°C); check the center with a food thermometer. Avoid repeatedly cooling and reheating the full pot. For longer storage, freeze cooled portions in airtight freezer-safe containers for up to 3 months. Thaw overnight in the refrigerator, then reheat as described; the potatoes may soften slightly after freezing.

Frequently Asked Questions

Do I need to soak lentils before making sopa de lentejas?
No. Brown and green lentils cook well without soaking, and rinsing is enough for this recipe. Soaked lentils may cook faster and can become soft before the potatoes are done, so if you have soaked them, begin checking for tenderness earlier and adjust the simmer time.

Why are my lentils still firm after the suggested cooking time?
Lentils do not all cook at exactly the same speed. Older lentils, a simmer that is too low, or hard water can extend cooking. Keep the soup at a gentle simmer and check every 5 minutes until the lentils are tender. Acidic ingredients can slow softening, which is why the vinegar goes in at the end rather than at the beginning.

Can I make this soup in advance?
Yes. The flavor settles nicely as the soup rests, and it can be made up to 3 to 4 days ahead if refrigerated promptly. Store it in a shallow airtight container, then reheat the amount you need to 165°F (74°C). Keep extra broth or water available because the lentils continue absorbing liquid in the refrigerator.

Can I use canned lentils instead of dried?
Yes, but they need far less cooking. Drain and rinse about 3 cans (15 ounces or 425 g each) of lentils, then simmer the vegetables, potatoes and broth until the potatoes are tender. Stir in the canned lentils for the final 10 minutes so they warm through without breaking down. You may need less broth because the shorter simmer evaporates less liquid.

What is the best way to make the soup less thick?
Stir in hot vegetable broth or water a few tablespoons at a time until it reaches the consistency you want. Taste again after thinning, since extra liquid can dilute the salt and paprika. If the soup is already in individual bowls, add hot broth directly to each one rather than thinning the whole batch.

Can I freeze sopa de lentejas?
Yes. Freeze it in meal-size portions in airtight containers, leaving a little space at the top for expansion, for up to 3 months. Thaw it in the refrigerator and reheat thoroughly. Potatoes can turn a little softer after freezing, but the soup remains suitable for serving; mash the softened pieces into the broth if you prefer a more even texture.

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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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