Lemony Lentil Soup With Cumin

Imperial May 17, 2026May 17, 2026

Quick Recipe Version (TL;DR)

Yield: 6 servings
Prep Time: 15 minutes
Cook Time: 40 minutes
Total Time: 55 minutes

Quick Ingredients

3 tablespoons extra-virgin olive oil, divided
1 large yellow onion, finely diced
2 medium carrots, peeled and diced
2 celery ribs, diced
4 garlic cloves, minced
2 teaspoons ground cumin
1 teaspoon ground coriander
1/4 teaspoon crushed red pepper flakes, optional
1 1/2 cups dry brown or green lentils, rinsed and sorted
6 cups low-sodium vegetable broth
2 cups water
1 bay leaf
1 teaspoon kosher salt, plus more to taste
1/2 teaspoon freshly ground black pepper
2 tablespoons fresh lemon juice, plus wedges for serving
1/3 cup chopped fresh parsley or cilantro

Do This

1. Warm 2 tablespoons olive oil in a large pot over medium heat for 2 minutes.
2. Cook onion, carrots, and celery with 1/2 teaspoon salt for 8 minutes, stirring often.
3. Add garlic, cumin, coriander, and red pepper flakes; cook for 1 minute until fragrant.
4. Stir in lentils, broth, water, bay leaf, remaining salt, and black pepper.
5. Simmer uncovered for 30 to 35 minutes, until lentils are tender but not mushy.
6. Optional: blend 2 cups of soup and stir it back in for a creamier texture.
7. Finish with lemon juice, herbs, and 1 tablespoon olive oil; serve hot with lemon wedges.

Why You’ll Love This Recipe

Simple pantry ingredients: Lentils, broth, cumin, garlic, and lemon turn into a deeply satisfying meal.
Bright and cozy: Earthy lentils and warm spices are lifted by fresh lemon juice and herbs at the end.
Naturally wholesome: This soup is hearty, high in plant-based protein and fiber, and completely dairy-free.
Great for meal prep: It reheats beautifully and tastes even better the next day.

Grocery List

Produce: 1 large yellow onion, 2 medium carrots, 2 celery ribs, 4 garlic cloves, 1 large lemon, fresh parsley or cilantro
Dairy: None needed
Pantry: Extra-virgin olive oil, dry brown or green lentils, low-sodium vegetable broth, ground cumin, ground coriander, crushed red pepper flakes, bay leaf, kosher salt, black pepper

Full Ingredients

Soup Base

2 tablespoons extra-virgin olive oil, for sautéing
1 large yellow onion, finely diced, about 1 1/2 cups
2 medium carrots, peeled and diced into 1/4-inch pieces, about 1 cup
2 celery ribs, diced into 1/4-inch pieces, about 3/4 cup
4 garlic cloves, minced
1 teaspoon kosher salt, divided, plus more to taste

Spices and Lentils

2 teaspoons ground cumin
1 teaspoon ground coriander
1/4 teaspoon crushed red pepper flakes, optional
1 1/2 cups dry brown or green lentils, rinsed and sorted
1 bay leaf
1/2 teaspoon freshly ground black pepper

Liquid

6 cups low-sodium vegetable broth
2 cups water

Finishing Ingredients

2 tablespoons fresh lemon juice, from about 1 large lemon
1 tablespoon extra-virgin olive oil, for finishing
1/3 cup chopped fresh parsley or cilantro
Lemon wedges, for serving
Additional black pepper, to taste

Step-by-Step Instructions

Step 1: Rinse and sort the lentils

Place 1 1/2 cups dry brown or green lentils in a fine-mesh strainer. Rinse them under cool running water for 30 to 45 seconds, using your fingers to move them around so any dust or starch washes away. Pick out and discard any small stones, shriveled lentils, or debris. Set the rinsed lentils aside while you start the soup base.

Step 2: Soften the vegetables

Set a large Dutch oven or heavy soup pot over medium heat. Add 2 tablespoons extra-virgin olive oil and let it warm for about 2 minutes, until the oil looks glossy but is not smoking. Add the diced onion, carrots, celery, and 1/2 teaspoon kosher salt. Cook for 8 minutes, stirring every minute or so, until the onion turns translucent and the carrots begin to soften.

Step 3: Bloom the garlic and spices

Add the minced garlic, 2 teaspoons ground cumin, 1 teaspoon ground coriander, and 1/4 teaspoon crushed red pepper flakes, if using. Stir constantly for 1 minute. This brief cooking time wakes up the spices and takes the sharp edge off the garlic without letting it brown. The mixture should smell warm, savory, and fragrant.

Step 4: Add the lentils and liquid

Stir in the rinsed lentils so they are coated in the spiced vegetable mixture. Add 6 cups low-sodium vegetable broth, 2 cups water, 1 bay leaf, the remaining 1/2 teaspoon kosher salt, and 1/2 teaspoon black pepper. Scrape the bottom of the pot with a wooden spoon to loosen any flavorful bits stuck to the pan.

Step 5: Simmer until tender

Increase the heat to medium-high and bring the soup to a steady boil, which should take 5 to 7 minutes. Once boiling, reduce the heat to medium-low to maintain a gentle simmer. Cook uncovered for 30 to 35 minutes, stirring every 10 minutes, until the lentils are tender but still mostly holding their shape. If the soup gets thicker than you like, add additional water or broth, 1/2 cup at a time.

Step 6: Adjust the texture

Remove and discard the bay leaf. For a rustic, brothy soup, leave the soup as is. For a thicker, creamier soup without adding cream, ladle about 2 cups of soup into a blender, blend until smooth for 30 to 45 seconds, and stir it back into the pot. You can also use an immersion blender directly in the pot for 5 to 10 seconds, blending just a portion so the soup keeps plenty of texture.

Step 7: Finish with lemon, olive oil, and herbs

Turn off the heat. Stir in 2 tablespoons fresh lemon juice, 1 tablespoon extra-virgin olive oil, and 1/3 cup chopped parsley or cilantro. Taste and adjust with more salt, black pepper, or lemon juice as needed. The soup should taste earthy from the lentils, warmly spiced from the cumin, and bright at the finish from the lemon.

Step 8: Serve hot

Ladle the soup into bowls while hot, ideally at about 165°F for serving. Finish each bowl with an extra drizzle of olive oil, a pinch of fresh herbs, and a lemon wedge on the side. Serve with warm crusty bread, pita, or a simple green salad for a complete everyday meal.

Pro Tips

Use brown or green lentils: They hold their shape better than red lentils and give the soup a satisfying, hearty texture.
Salt in stages: Adding some salt with the vegetables helps build flavor early, while final seasoning after the lemon keeps the soup balanced.
Do not skip the lemon: The final squeeze brightens the earthy lentils and makes the cumin taste more vibrant.
Control the thickness: Lentils continue to absorb liquid as they sit, so add 1/4 to 1/2 cup water or broth when reheating if needed.
Bloom the cumin: Cooking the cumin briefly in oil before adding liquid makes the soup taste deeper and more aromatic.

Variations

Leafy green lentil soup: Stir in 3 packed cups chopped spinach, kale, or Swiss chard during the last 5 minutes of cooking.
Tomato-cumin lentil soup: Add 2 tablespoons tomato paste with the garlic and spices, cooking it for 1 minute before adding the lentils and broth.
Extra-spiced version: Add 1/2 teaspoon smoked paprika and 1/4 teaspoon turmeric with the cumin for a deeper color and warmer flavor.

Storage & Make-Ahead

Let the soup cool at room temperature for no more than 1 hour, then transfer it to airtight containers. Refrigerate for up to 5 days or freeze for up to 3 months. To reheat from the refrigerator, warm gently in a saucepan over medium-low heat for 8 to 10 minutes, stirring occasionally, until the soup reaches 165°F. To reheat from frozen, thaw overnight in the refrigerator, then warm on the stovetop; add 1/4 to 1/2 cup water or broth if the soup has thickened. For make-ahead prep, dice the onion, carrots, and celery up to 2 days in advance and store them in an airtight container in the refrigerator.

Nutrition (per serving)