Turkish Soup Ingredients for Classic Red Lentil Soup

Turkish red lentil soup, or mercimek çorbası, is a smooth, warmly seasoned soup made with red lentils, vegetables, and broth. This home-style version uses cumin, tomato paste, and lemon for a savory, bright flavor, and is served hot with a buttery pepper topping. Recipes vary from household to household; the ingredients below make a balanced, easy-to-follow version.

Ingredients

2 tablespoons (30 ml) olive oil
1 medium yellow onion, finely diced, about 1 cup (150 g)
1 medium carrot, peeled and diced, about ¾ cup (100 g)
1 small potato, peeled and diced, about 1 cup (150 g)
2 garlic cloves, minced, about 2 teaspoons (6 g)
1 tablespoon (16 g) tomato paste
1 cup (190 g) dried split red lentils, rinsed and drained
6 cups (1.42 L) low-sodium chicken broth or vegetable broth
1 teaspoon (2 g) ground cumin
½ teaspoon (1 g) sweet paprika
½ teaspoon (about 0.5 g) dried mint, optional
1 teaspoon (6 g) fine salt, or to taste
¼ teaspoon (about 0.5 g) freshly ground black pepper
2 tablespoons (28 g) unsalted butter
½ teaspoon (about 1 g) Aleppo pepper or pul biber, for the topping
1 tablespoon (15 ml) lemon juice, plus lemon wedges for serving
2 tablespoons (8 g) chopped fresh parsley, for serving

Instructions

Prepare the vegetables and lentils. Dice the onion, carrot, and potato into small pieces so they soften at a similar rate. Mince the garlic. Rinse the lentils in a fine-mesh sieve under cool water until the water runs mostly clear, then drain them well. This prep takes about 15 minutes, including measuring the spices and broth.
Soften the vegetables. Heat the olive oil in a large, heavy-bottomed pot over medium heat. Add the onion and carrot and cook for about 7 minutes, stirring occasionally, until the onion is translucent and the carrot begins to soften. If the vegetables start to brown quickly, lower the heat; the goal is to soften them gently, not crisp them.
Cook the garlic and tomato paste. Stir in the garlic and cook for 1 minute, just until fragrant. Add the tomato paste and cook for another minute, stirring to coat the vegetables. Briefly cooking the paste mellows its raw flavor and helps it blend into the broth.
Add the lentils, potato, broth, and seasonings. Stir in the rinsed lentils, diced potato, cumin, paprika, dried mint if using, salt, and black pepper. Pour in the broth and scrape the bottom of the pot to loosen any tomato paste. Raise the heat and bring the soup to a gentle boil, which should take about 3 minutes.
Simmer until tender. Reduce the heat to maintain a steady, gentle simmer and cook uncovered for 22 minutes, stirring every few minutes so lentils do not stick. The lentils should be soft and beginning to break down, while the potato should mash easily against the side of the pot. If the soup is bubbling vigorously, lower the heat to prevent splattering.
Blend to your preferred texture. Remove the pot from the heat. Use an immersion blender to puree the soup until smooth, about 2 minutes, keeping the blender head below the surface to limit splashes. Alternatively, blend in batches in a countertop blender, filling it no more than halfway and venting the lid carefully because hot soup expands. For a more rustic bowl, blend only part of the soup.
Make the pepper butter and finish the soup. In a small pan, melt the butter over low heat. Stir in the Aleppo pepper and warm it for about 30 seconds, taking care not to scorch the butter or spice. Stir the lemon juice into the soup, taste, and adjust the salt or pepper. Ladle into bowls and drizzle each serving with some pepper butter; finish with parsley and lemon wedges.

Tips

Rinse and sort the lentils. Pick out any small stones or debris before rinsing. Red lentils are often sold split and hulled, so they cook quickly and soften into the soup; green or brown lentils take longer and stay firmer, so they are not a direct swap for this smooth texture.
Adjust the thickness with broth. The soup thickens as the lentils break down and again as it cools. If it seems too thick after blending, stir in warm broth or water a little at a time. If it is thinner than you like, simmer it uncovered for a few extra minutes before adding the lemon.
Use Aleppo pepper or a mild substitute. Aleppo pepper, also called pul biber, has a gentle warmth and fruity flavor. If you cannot find it, use the same amount of sweet paprika with a small pinch of cayenne; the topping will be less fruity and a little hotter, so add cayenne cautiously.
Season at the end as well as the start. Broths vary in saltiness, and lemon can make a soup taste brighter without adding much salt. Taste after blending, then adjust the salt and lemon gradually. Keep the heat low when making the butter topping so the pepper stays fragrant rather than bitter.

Serving Suggestions

Serve the soup hot in shallow bowls with lemon wedges, parsley, and a drizzle of the pepper butter. A squeeze of lemon just before eating gives the lentils a fresh, lively finish, while the buttery topping adds a mild, toasted-spice aroma. Let each person add lemon to taste, especially if serving children or anyone who prefers a gentler, less tart bowl.

Crusty bread or warm flatbread is useful for dipping and makes a simple accompaniment. For a fuller meal, serve the soup alongside a chopped tomato-and-cucumber salad, or add a small plate of olives and cheese. If offering toppings, keep them separate so guests can choose how much parsley, pepper butter, or lemon they want. The soup is filling on its own, too, making it a practical first course or a light main meal.

Variations

Make it vegetarian or vegan: Use vegetable broth instead of chicken broth. For a fully plant-based soup, replace the butter with olive oil or a plant-based butter for the pepper topping. Olive oil gives the topping a lighter, fruitier flavor, while dairy butter tastes richer.

Change the seasoning: Cumin and paprika provide a familiar, gently earthy base, but the amount of dried mint varies among home versions. Leave it out for a simpler flavor, or add a little more if you enjoy its cool herbal note. Some cooks prefer a pinch of pul biber in the soup itself as well as in the topping; add it sparingly so it does not overpower the lentils.

Skip the potato: The potato helps give this version a silky body, but it is optional. Leave it out and use the same method; the finished soup may be a little less thick. You can simmer it for a few extra minutes or blend thoroughly to help the lentils create a smooth texture. Avoid adding a large quantity of extra vegetables without also adjusting the broth, or the soup may become crowded and overly thick.

Make it more rustic: Instead of blending the entire pot, puree about half and stir it back in. This keeps some lentils and vegetable pieces intact while still giving the broth body. If using a countertop blender, work in small batches and follow the hot-liquid precautions in the instructions.

Storage and Reheating

Cool the soup promptly and refrigerate it within 2 hours of cooking, using shallow, covered containers so it chills efficiently. Keep it refrigerated for 3 to 4 days. It will thicken as it sits, so loosen individual portions with a splash of water or broth when reheating. For the best texture, store the pepper butter separately if convenient, though it can also be added to the soup before storing.

Reheat a portion in a saucepan over medium-low heat, stirring often, until steaming throughout. Add liquid as needed to restore a spoonable consistency. For food safety, USDA FSIS recommends reheating leftovers to 165°F (74°C); check the center with a food thermometer. In a microwave, cover the bowl loosely, stir at intervals, and check the temperature in more than one spot. Freeze cooled soup in airtight containers for up to 2 to 3 months for best quality. Thaw it in the refrigerator, then reheat as described; the texture may separate slightly, but stirring or a quick blend will bring it together.

Frequently Asked Questions

Can I use another kind of lentil?
Red lentils are the best fit because they soften and blend into a smooth soup within the stated cooking time. Yellow split lentils are the closest substitute and may need a few extra minutes to become tender. Brown or green lentils hold their shape more and take longer, so the soup will have a different texture and require a longer simmer.

Do I need to soak red lentils first?
No. Split red lentils cook quickly, so rinsing them is enough for this recipe. Soaking can make them soften even faster, but it is unnecessary and changes the timing. If they have been soaked, start checking tenderness earlier so they do not turn overly thick before the vegetables are ready.

Can I make this soup without a blender?
Yes. Simmer the soup until the lentils and potato are very soft, then mash them against the side of the pot with a potato masher or the back of a sturdy spoon. The result will be less smooth but still flavorful. You can also leave it chunky by skipping the blending step altogether.

Why did my soup become so thick?
Red lentils continue absorbing liquid as the soup rests, and blending makes their starches feel even silkier. Stir in warm water or broth until the consistency is right, then taste again because extra liquid can dilute the seasoning. For leftovers, add liquid during reheating rather than thinning the whole batch in advance.

Can I prepare the soup ahead of time?
Yes. Make it up to 3 to 4 days ahead and refrigerate it promptly in a covered container. For a fresh finish, prepare the pepper butter and chop the parsley shortly before serving. Reheat the soup gently, loosen it with broth if needed, and bring leftovers to 165°F (74°C) before serving.

More recipes to cook

Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes

Spotted an error? Tell us and we will correct it (corrections policy).