Turkish Red Lentil Soup
mercimek çorbası — the pantry pot

A bag of red lentils, one onion, a tin of tomato paste, and four spices. Everything simmers in a pot for twenty minutes, blends into something with the texture of silk, and comes to the table with a drizzle of brown butter sizzling with paprika. This is mercimek çorbası — Turkish red lentil soup — and it is one of the most honest pantry dishes in the world.

Red lentils are different from green or brown lentils in one important way: they dissolve completely when cooked long enough. There is no soaking required, no tough outer skin to worry about, and no separate blending step unless you want an extra-smooth texture. After twenty minutes of simmering, they have broken down into a thick, creamy porridge that only needs stirring together and a little stock to become soup. The blending step is optional but makes a significant difference to the final texture — blended, the soup becomes glossy and smooth and clings to a spoon like a cream soup.

The finishing drizzle of brown butter with paprika is not decorative. It adds fat and richness that the otherwise lean soup lacks, and the paprika bloomed in hot butter has a different, deeper flavor than paprika added dry to the broth. Two tablespoons of butter for a four-person pot is a modest amount — but it transforms the final bowl.

What you need

• 200g (1 cup) dried red lentils — split red lentils are ideal; they cook fastest and blend smoothest
• 1 medium onion, diced
• 3 garlic cloves, minced
• 1 tablespoon tomato paste — concentrated; a small tin or tube
• 1 teaspoon ground cumin
• 1 teaspoon sweet paprika (not smoked, though smoked works)
• 2 tablespoons olive oil
• 1.2 litres (5 cups) vegetable stock — or water with a stock cube
• Salt and black pepper
• For the butter drizzle: 2 tablespoons butter, 1 teaspoon sweet paprika, a pinch of dried mint or sumac (optional)
• To serve: lemon wedges; crusty bread or flatbread (optional)

How to make it

Step 1: Cook the onion base. Heat the olive oil in a large pot over medium heat. Add the diced onion and a pinch of salt. Cook, stirring occasionally, for seven minutes until the onion is soft, golden, and slightly sweet-smelling. Onions that are properly cooked at this stage — genuinely golden, not just translucent — add a significant layer of sweetness and depth to the finished soup. Add the minced garlic and the cumin. Cook for one minute more, stirring constantly, until the garlic softens.

Step 2: Add tomato paste and spices. Add the tomato paste directly to the pot and stir it into the onion mixture. Cook it, stirring and pressing it against the bottom of the pot, for one to two minutes until it darkens from bright red to a deeper brick color and smells slightly sweet and concentrated. This step is called "frying" the tomato paste — cooking it in oil before adding liquid removes the raw, slightly metallic edge and transforms it into something richer. Add the paprika, stir for ten seconds.

Step 3: Add lentils and simmer. Rinse the red lentils under cold water in a sieve until the water runs mostly clear — this removes any surface starch and some dust. Add them to the pot along with the stock. Stir to combine. Bring to a boil over high heat, then reduce to a steady simmer. Cook uncovered for 20 minutes, stirring occasionally. The lentils will absorb the liquid and gradually break apart until the pot looks like a thick, orange porridge. If it starts to look dry before the lentils are fully soft, add another cup of hot water.

Step 4: Blend until smooth. Remove the pot from the heat. Use an immersion blender to blend the soup directly in the pot until completely smooth — two to three minutes of thorough blending. Alternatively, transfer in batches to a stand blender (always remove the center cap of the lid and hold a folded towel over the opening to allow steam to escape). Return to the pot and return to low heat. Stir in extra water or stock to reach your preferred consistency — the soup should flow slowly from a ladle, not plop in chunks. Taste and adjust seasoning with salt, black pepper, and lemon juice.

Step 5: Make the butter drizzle. In a small saucepan or skillet over medium heat, melt the butter. Keep cooking and swirling the pan as the butter foams. After two to three minutes the foam will subside and the butter will begin to turn golden with brown flecks forming on the bottom — this is the milk solids caramelizing. When the butter is golden and smells nutty, immediately remove from heat and stir in the paprika. The paprika will sizzle briefly. Have the bowls ready — this butter needs to go on the soup right away before it cools. Ladle the soup into bowls, then spoon a generous drizzle of the paprika butter over each serving. Add a pinch of dried mint or sumac if using. Serve with lemon wedges.

On blending safety

Hot soup in a stand blender can be dangerous if the lid is sealed — steam pressure builds rapidly and can blow the lid off. Always leave the center vent of a blender lid open (cover it with a folded cloth held firmly) when blending hot liquids, and fill no more than halfway. An immersion blender is safer for hot soups and requires no transfer.

Chef notes

This soup freezes perfectly. Make a double batch and freeze individual portions. To reheat from frozen, put directly into a pot with a splash of water over medium-low heat, stirring as it thaws. The texture is completely preserved after freezing, which is unusual for a blended soup — the lentil starch holds the emulsion stable.

Variations

• Add carrot: Two medium carrots, diced and added with the onion, sweeten the soup and deepen the color to a brighter orange.
• Spice variation: Add half a teaspoon of turmeric and a pinch of cayenne with the cumin for a warmer, more complex flavor.
• Dairy-free: Substitute olive oil for the butter in the finishing drizzle. Bloom the paprika in hot olive oil for a similar effect.
• With a yogurt swirl: A spoonful of full-fat yogurt swirled into each bowl alongside the butter drizzle is the traditional Turkish presentation.

See also: 30-minute lentil soup · Black lentil dal from pantry · Creamy tomato lentils · All recipes · Pricing