Turkish Recipe Books: A Classic Lentil Soup

Mercimek çorbası is a Turkish red lentil soup made with lentils, vegetables, warm spices, and a buttery pepper finish. This recipe is smooth, filling, and straightforward to make, with lemon and pul biber bringing brightness and gentle heat; Turkish households and regional recipes vary in their seasonings and texture.

Ingredients

1½ cups (285 g) dried red lentils, rinsed and drained
1 medium yellow onion (about 150 g), diced
1 medium carrot (about 100 g), peeled and diced
1 small potato (about 150 g), peeled and diced
2 tablespoons (30 ml) olive oil
1 tablespoon (16 g) tomato paste
1 teaspoon (2 g) ground cumin
1 teaspoon (2 g) sweet paprika
½ teaspoon dried mint (about 0.5 g)
¼ teaspoon ground black pepper (about 0.5 g)
1½ teaspoons (7 g) fine salt, or to taste
7 cups (1.66 L) water or low-sodium vegetable broth
2 tablespoons (28 g) unsalted butter
1 teaspoon (2 g) pul biber, plus more to taste
1 lemon, cut into wedges, for serving

Instructions

Rinse the lentils in a fine-mesh sieve under cool running water, stirring them with your fingers until the water runs mostly clear. Drain well. Dice the onion, carrot, and potato into small, fairly even pieces so they soften at a similar rate. Measure out the spices and liquid before you start cooking; once the vegetables are in the pot, the early steps move quickly.
Heat the olive oil in a large, heavy-bottomed pot over medium heat. Add the onion, carrot, and potato and cook for about 7 minutes, stirring often. The onion should look translucent and the vegetables should begin to soften, but they do not need to brown. If the onion starts sticking, lower the heat and add a spoonful of water rather than letting the fond scorch.
Stir in the tomato paste, cumin, paprika, dried mint, black pepper, and salt. Cook for 2 minutes, stirring continuously, until the paste darkens slightly and smells fragrant. This short step takes away the raw taste of the tomato paste and helps coat the vegetables in the spices. Keep the heat moderate: paprika and tomato paste can catch on the bottom of a hot pot.
Add the rinsed lentils and 7 cups (1.66 L) of water or vegetable broth. Stir and scrape the bottom of the pot to loosen any browned paste. Bring the liquid just to a boil, then reduce the heat to maintain a gentle simmer. Partially cover the pot and cook for 25 minutes, stirring every few minutes, until the lentils have broken down and the vegetables are completely tender. If the soup gets thicker than you like before the vegetables soften, add water ¼ cup (60 ml) at a time.
Take the pot off the heat. Blend the soup with an immersion blender until smooth, keeping the blender head below the surface to limit splashes. If using a countertop blender, let the soup cool briefly, work in small batches, and leave room for steam to escape according to the blender’s instructions. Return the soup to the pot if needed. Stir in a little hot water if it is too thick, then taste and adjust the salt, pepper, or lemon served alongside it.
For the pepper butter, melt the butter in a small pan over low heat. Stir in the pul biber and warm for about 1 minute, just until the butter is fragrant and lightly colored; do not let the pepper burn. Ladle the soup into bowls and drizzle each serving with some of the butter. Serve hot with lemon wedges so everyone can add lemon to taste.

Tips

Choose red lentils, not green or brown. Split red lentils soften and nearly dissolve during the simmer, creating the soup’s characteristic velvety texture. Green or brown lentils hold their shape and take longer to cook, so they are not a direct swap for this method. Red lentils are usually sold dried in grocery stores; rinse them well, but there is no need to soak them.
Adjust the thickness after blending. Lentils continue to absorb liquid as the soup stands, and different brands can thicken at different rates. Add hot water or broth a little at a time until it pours easily from a ladle. If it seems thin, simmer it uncovered for a few minutes and stir frequently, rather than adding extra lentils that have not had time to cook.
Use pul biber if you can find it. Turkish pul biber, sometimes called Aleppo-style pepper, is fruity and moderately warm, with less sharp heat than many standard chili flakes. If it is unavailable, use Aleppo pepper or a small pinch of mild red pepper flakes. The substitute may taste sharper or hotter, so start with less and add more only after tasting.
Blend carefully and season at the end. Hot soup can expand and splash in a closed blender, so use small batches and follow the appliance’s venting directions. After blending, taste before adding more salt: broth and tomato paste can already be salty. A squeeze of lemon usually makes the lentil flavor more vivid without requiring extra seasoning.

Serving Suggestions

Serve the soup in warm bowls with lemon wedges and the pul biber butter spooned over the top. A crisp salad of cucumber, tomato, parsley, and onion makes a fresh contrast to the smooth soup. Warm flatbread or crusty bread is useful for wiping the bowl, and a small dish of olives or pickled vegetables gives the meal a salty, tangy side. For a more substantial lunch or supper, add a simple rice pilaf or a plate of roasted vegetables.

Offer the lemon separately rather than adding all the juice to the pot. That way, diners can choose how tart they want their bowl, and leftovers remain easier to adjust the next day. The soup is also suitable as a first course: serve smaller portions and keep the garnish light so it does not overwhelm the rest of the meal. If serving several people, keep the soup warm over very low heat and stir it often, since its starch can settle and thicken at the bottom.

Variations

Make it dairy-free: Replace the butter in the finishing drizzle with olive oil. Warm the oil gently with the pul biber, just as you would the butter. The flavor will be less creamy but still aromatic. Check that any broth you use is also dairy-free if that matters for your meal.

Use a different pepper finish: If pul biber is not available, use Aleppo pepper or a pinch of mild red pepper flakes. For a very gentle version, leave the chili out of the butter and let each person add black pepper or chili at the table. Avoid adding a full teaspoon of hot cayenne as a direct substitute; it can make the soup much hotter and less fruity.

Keep it rustic: Instead of blending every spoonful smooth, mash the softened vegetables and lentils with a potato masher until the soup is mostly creamy but still has some texture. This takes a little more stirring at the table, but it avoids using a blender and gives the bowl a heartier feel.

Change the vegetable balance: You can omit the potato and use an extra ½ cup (about 75 g) of carrot for sweetness, or add a small celery stalk (about 40 g) with the onion for a more savory base. These are practical home-style adjustments rather than a claim that every Turkish version uses the same vegetables. Keep the total amount of vegetables close to the recipe so the lentils remain the main ingredient.

Storage and Reheating

Cool the soup promptly and refrigerate it within 2 hours of cooking, in shallow airtight containers. It keeps for 3–4 days in the refrigerator. The lentils will absorb liquid while chilled, so the soup may look much thicker the next day; that is normal. Store the pepper butter separately when possible so the garnish keeps its aroma, and add fresh lemon when serving rather than mixing it into the whole batch.

Reheat only the portion you plan to eat in a saucepan over medium-low heat, stirring frequently and adding water or broth until it reaches your preferred consistency. Heat leftovers to 165°F (74°C), stirring so the temperature is even throughout. In a microwave, cover loosely, heat in short intervals, and stir between intervals; check that the center is steaming hot and reaches 165°F (74°C). Freeze cooled soup in airtight, freezer-safe containers for up to 2–3 months for best quality, leaving a little room for expansion. Thaw it in the refrigerator before reheating, and do not leave cooked soup at room temperature for extended storage.

Frequently Asked Questions

Do I need to soak red lentils before cooking?
No. Rinsing is enough for this recipe. Red lentils are split and cook relatively quickly, so soaking is unnecessary and may make them soften faster than expected. Rinsing removes dust and loose starch; draining them well also prevents extra rinse water from changing the recipe’s liquid balance.

Can I make the soup without a blender?
Yes. Simmer until the lentils and vegetables are very soft, then mash the soup with a potato masher for a rustic texture. You can also leave it unblended, though the broth will be less uniform. Do not try to mash vegetables that are still firm; cook them longer with a splash of water first.

Why did my soup become so thick?
Red lentils continue to absorb liquid after cooking, especially as the soup cools and chills. Stir in hot water or broth a little at a time while reheating until it is loose enough to ladle. If you add liquid while the soup is cold, it may seem thin in one spot and thick in another, so stir thoroughly and warm it gently.

Is this soup spicy?
The soup base is mildly seasoned, and most of its chili flavor comes from the pul biber butter. Pul biber is usually more fragrant than intensely hot, but varieties differ. Use half the amount for a gentler bowl, or serve the pepper butter on the side so each person can choose how much to add.

Can I use canned lentils?
Dried red lentils work best because they break down as they simmer and give the soup its body. Canned lentils are already cooked and often firmer varieties, so they will not produce quite the same smooth result. If you use them, drain and rinse them, reduce the added liquid, simmer only long enough to soften the vegetables, and blend thoroughly; expect a different texture and flavor.

Can I prepare the soup ahead?
Yes. Make the soup through blending, cool it promptly, and refrigerate it for up to 3–4 days. Reheat it gently with extra water or broth as needed, then make the pul biber butter just before serving for the freshest aroma. You can also freeze portions and thaw them in the refrigerator before reheating to 165°F (74°C).

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