Lentil Soup

Published by Fork Around & Find Out Kitchen — presented in the Lila editorial voice. Editorial standards

Quick Answer

To make lentil soup, bloom warm spices in oil with sautéed aromatics, then simmer lentils and tomatoes in broth until tender. A finish of lemon juice brightens the whole dish and brings all the flavors into focus.

Jump to Recipe

Lentil soup has been unfairly punished by generations of people who thought “healthy” meant spices were somehow optional. Not here. Onion, carrot, and celery get a full seven or eight minutes in olive oil before garlic, cumin, coriander, smoked paprika, turmeric, and cayenne hit the pot. Give those spices a minute or two in the oil and the soup starts smelling like dinner before the broth even arrives.

Green or brown lentils simmer with tomatoes and broth for 25 to 30 minutes, long enough to become tender and begin breaking down slightly. Then partially blend the soup—just a few pulses with an immersion blender—to thicken the broth while keeping plenty of intact lentils and vegetables. That small step gives you body without turning the entire pot into brown purée, which is a visual category lentils do not need help entering.

Fresh lemon juice goes in last, and it is not optional garnish. The acid lifts the cumin, smoke, tomatoes, and earthy lentils so the finished soup tastes complete instead of merely warm. Add parsley or cilantro and crusty bread. It is inexpensive, filling, heavily seasoned, and finally allowed to have a personality.

Prep15 minutes

Cook35 minutes

Total50 minutes

Serves6 servings

DifficultyEasy

Ingredients

Servings

3 tablespoons olive oil
1 large yellow onion, diced
3 medium carrots, peeled and diced
3 stalks celery, diced
6 cloves garlic, minced
2 teaspoons ground cumin
1 teaspoon ground coriander
1 teaspoon smoked paprika
1/2 teaspoon ground turmeric
1/4 teaspoon cayenne pepper (adjust to taste)
1 can (14.5 oz) diced tomatoes
1 1/2 cups green or brown lentils, rinsed and picked over
6 cups low-sodium vegetable or chicken broth
1 teaspoon kosher salt, plus more to taste
1/2 teaspoon black pepper
2 tablespoons fresh lemon juice (about 1 lemon)
Fresh parsley or cilantro, chopped, for serving

Instructions

1Heat olive oil in a large pot or Dutch oven over medium heat. Add the diced onion, carrot, and celery. Cook, stirring occasionally, until the vegetables have softened and the onion is translucent, about 7-8 minutes.
2Add the minced garlic, cumin, coriander, smoked paprika, turmeric, and cayenne. Stir constantly and cook for 1-2 minutes until the spices are fragrant and have darkened slightly. Do not skip this step — it is where the flavor actually starts.
3Pour in the diced tomatoes with their juices and stir to combine, scraping up any browned bits from the bottom of the pot.
4Add the rinsed lentils and broth. Stir in the salt and black pepper. Raise the heat to bring the soup to a boil.
5Once boiling, reduce heat to low, partially cover the pot, and simmer for 25-30 minutes, stirring occasionally, until the lentils are completely tender and beginning to break down slightly.
6Use an immersion blender to partially blend the soup — about 4-5 pulses — to thicken it while leaving plenty of whole lentils and vegetable pieces for texture. Alternatively, scoop out 2 cups of soup, blend it in a regular blender, and stir it back in. You can also skip this step entirely if you prefer a brothier soup.
7Stir in the lemon juice. Taste and adjust salt, pepper, and lemon as needed. The lemon is not optional — it is what wakes the whole thing up.
8Ladle into bowls and top with fresh parsley or cilantro. Serve with crusty bread or flatbread on the side.

Nutrition Information

Estimated per serving: 1 of 6 servings.

180Calories

9 gProtein

22 gCarbohydrates

8 gTotal Fat

1 gSaturated Fat

7 gFiber

6 gTotal Sugars

1260 mgSodium

0 mgCholesterol

Estimated from the ingredients and quantities in this recipe using standard food-composition values. Brand choices, trimming, cooking loss, optional ingredients, and actual portion size can change the numbers. How we calculate nutrition estimates.

Pro Tips

Rinse your lentils thoroughly under cold water and spread them on a light-colored surface for a quick once-over — field lentils occasionally contain a small pebble that has never once been labeled as a bonus feature.
Bloom your spices in the oil before the liquid goes in. This is the single step most people skip and most recipes under-explain. Thirty seconds of stirring spices in hot fat does more for depth of flavor than doubling the amount of spice ever would.
The partial blend is optional but genuinely worth doing. It thickens the soup into something that feels substantial without turning it into baby food, which is a texture nobody asked for.

Substitutions

green or brown lentils → red lentils Red lentils break down fully and create a creamier, thicker texture — reduce cook time to 20 minutes and skip the blending step since they'll do it themselves

vegetable broth → chicken broth Chicken broth adds a richer base flavor; use low-sodium so you control the salt level

diced tomatoes (canned) → 2 medium fresh tomatoes, chopped Works well in summer when tomatoes are actually tomatoes; in winter, the canned version is better

fresh lemon juice → apple cider vinegar Use 1 tablespoon in place of 2 tablespoons lemon juice; adds brightness without the citrus flavor

smoked paprika → sweet paprika You'll lose the smoky undertone but the soup will still be flavorful — add a small pinch of chipotle powder if you want to get it back

Storage Instructions

Cool completely before storing. Refrigerate in an airtight container for up to 5 days. The soup thickens significantly as it sits — add a splash of broth or water when reheating and stir well. Freeze in portions for up to 3 months; thaw overnight in the refrigerator before reheating.

Make Ahead

This soup is actually better the next day after the flavors have had time to settle into each other. Make it up to 2 days ahead, store covered in the refrigerator, and reheat gently on the stovetop over medium-low heat with a little added broth to loosen it up.

Frequently Asked Questions

Can I adjust Lentil Soup for the ingredients I have?

Here are some substitutions to consider: green or brown lentils → red lentils; vegetable broth → chicken broth; and diced tomatoes (canned) → 2 medium fresh tomatoes, chopped.

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