I made an Easy Crockpot Soup that turns boring weeknights into a dinner people actually ask for seconds of.

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I’m obsessed with this lentil soup because it actually tastes like a real dinner after a long day. I love the way slow cooker lentils get tender but still hold up, and the tomato brightness from diced tomatoes cuts through the earthiness so it never gets dull.

I enjoy the little punch from garlic that sneaks in and makes every spoonful sing. It’s simple, filling, and doesn’t pretend to be fancy.

And it’s the sort of Easy Crockpot Soup I make when I want something honest, wildly satisfying, and totally fuss-free. Seriously, I crave it.

I make it every week.

Ingredients

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Lentils: hearty protein that soaks up flavors, keeps you full.
Vegetable broth: cozy base, it’s where everything simmers together.
Yellow onion: sweet, gives depth and those caramel notes.
Carrots: a bit of crunch and natural sweetness, nice balance.
Celery: grassy snap, it cuts through the richness.
Garlic: punchy aroma, it’s what wakes the soup up.
Diced tomatoes: juicy tang and chunky texture, keeps it lively.
Tomato paste: umami boost and thicker, richer body.
Olive oil: smooth mouthfeel, helps flavors meld together.
Dried thyme: subtle earthiness, almost herbal comfort.
Ground cumin: warm, smoky warmth that nods to spice.
Smoked paprika: optional punch of smokiness, I’d add it.
Bay leaf: background herbal note, basically invisible but important.
Kosher salt: brings everything into focus, don’t skip.
Black pepper: mild heat and sharpness, keeps it lively.
Red pepper flakes: optional kick if you want heat.
Lemon juice: bright finish, it wakes the whole bowl.
Fresh parsley: fresh green pop and pretty garnish.

Ingredient Quantities

1 1/2 cups dried brown or green lentils, rinsed

6 cups vegetable broth (low sodium preferred)

1 large yellow onion, diced

3 medium carrots, peeled and diced

2 celery stalks, diced

3 garlic cloves, minced

1 14.5 oz can diced tomatoes, undrained

2 tablespoons tomato paste

2 tablespoons olive oil

1 teaspoon dried thyme

1 teaspoon ground cumin

1/2 teaspoon smoked paprika (optional but recommended)

1 bay leaf

1 1/2 teaspoons kosher salt, plus more to taste

1/2 teaspoon freshly ground black pepper

1/4 teaspoon red pepper flakes (optional, for a little heat)

2 tablespoons fresh lemon juice (to finish, optional)

1/4 cup fresh parsley, chopped (for garnish, optional)

How to Make this

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1. In a skillet heat the olive oil over medium heat, add the diced onion, carrots and celery and cook until softened, about 5 to 7 minutes; stir in the minced garlic and cook 30 seconds more, just until fragrant.

2. Stir in the tomato paste, cooking 1 minute to deepen the flavor, then add the canned diced tomatoes (with their juices) and mix to combine.

3. Transfer the vegetable mixture to the crockpot, add the rinsed lentils, vegetable broth, dried thyme, ground cumin, smoked paprika, bay leaf, red pepper flakes if using, kosher salt and black pepper.

4. Give everything a good stir, scrape any browned bits from the skillet into the crockpot, then cover and cook on low for 6 to 8 hours or on high for 3 to 4 hours, until lentils are tender but not mushy.

5. Check the soup about halfway through cooking to make sure there is enough liquid; if it seems too thick add up to 1 cup more broth or water and stir.

6. When the lentils are tender taste and adjust seasoning, adding more salt, pepper or red pepper flakes if you want more heat.

7. Remove and discard the bay leaf, then stir in the fresh lemon juice to brighten the flavors if using; lemon really wakes this soup up so dont skip it if you like a little tang.

8. For a creamier texture mash a cup of the soup with a potato masher or use an immersion blender for a few pulses, but dont over-blend unless you want a puree.

9. Ladle into bowls and garnish with chopped fresh parsley. Serve with crusty bread or over rice for a heartier meal, and enjoy the leftovers because it only gets better the next day.

Equipment Needed

1. Slow cooker or crockpot (where the soup finishes cooking)
2. 10 to 12 inch skillet or sauté pan for browning the veggies
3. Cutting board (preferably one for veggies)
4. Chef’s knife for dicing onion, carrots and celery
5. Wooden spoon or silicone spatula to stir and scrape browned bits
6. Measuring cups and spoons for broth, lentils and spices
7. Can opener for the diced tomatoes
8. Colander or fine mesh sieve to rinse the lentils
9. Ladle for serving the soup
10. Potato masher or immersion blender if you want a creamier texture

FAQ

Q: Can I use red lentils instead of brown or green?

A: You can, but red lentils break down much faster and will make the soup thick and creamy, not chunky. If you want a more stew like texture, use brown or green. If you only have red, reduce the cook time and check for doneness earlier.

Q: Do I need to soak the lentils first?

A: No. Brown and green lentils do not need soaking and cook fine in the crockpot. Just rinse them well to remove any dust or debris.

Q: What slow cooker setting and how long should I cook it?

A: Cook on low for 6 to 8 hours or on high for 3 to 4 hours. Low is gentler and builds better flavor. Start checking near the lower end of those ranges so lentils don’t overcook.

Q: Soup came out too thin or too thick. How do I fix it?

A: Too thin? Simmer with the lid off for 15 to 30 minutes to reduce. Too thick? Stir in a little hot water or broth until you reach the consistency you like. You can also mash some lentils with a spoon to thicken without adding liquid.

Q: Can I freeze leftovers?

A: Yes. Cool completely then freeze in airtight containers for up to 3 months. Reheat gently on the stove and add a splash of water if it’s thicker after freezing.

Q: Any easy swaps for flavor or if I am out of ingredients?

A: No parsley? Use cilantro or skip it. No tomatoes? A couple tablespoons extra tomato paste plus a cup of water works. Want more heat? Add extra red pepper flakes or a dash of hot sauce at the end. Olive oil can be swapped for avocado or neutral oil.

Delicious Lentil Soup: Easy Crockpot Vegetarian Recipe Substitutions and Variations

Lentils: swap brown/green for red lentils for a creamier, faster-cook soup, or use 2 cans (15 oz each) rinsed and drained if you want speed and no babysitting.
Vegetable broth: use low-sodium chicken broth for a richer flavor, or just water plus 2 veggie bouillon cubes if thats what you have on hand.
Diced tomatoes: replace the 14.5 oz can with 1 1/2 cups crushed tomatoes or 1 cup tomato sauce + 1/2 cup water for a smoother, saucier result.
Olive oil: sub avocado oil or a neutral oil for high-heat, or use 2 tablespoons butter for a rounder, richer taste.

Pro Tips

– Sauté the mirepoix a little longer than you think you need to, let those veggies get a touch of color. That caramelization adds depth so the soup won’t taste flat after hours in the crockpot.

– Rinse but don’t soak the lentils. Rinsing removes grit and dust, soaking will make them go mushy during slow cooking. If the soup looks too thick near the end, add hot water or broth a little at a time rather than dumping a cup in all at once.

– Taste and adjust at the end, not the start. Slow cooking concentrates flavors so hold off on adding extra salt or heat until you’ve finished. Finish with the lemon juice right before serving to brighten everything up.

– If you want a silkier mouthfeel, mash about a cup of the soup or blitz briefly with an immersion blender, but leave some whole lentils for texture. If you plan to freeze leftovers, undercook the lentils by 10 to 15 minutes so they don’t turn to mush after reheating.

Delicious Lentil Soup: Easy Crockpot Vegetarian Recipe

Recipe by Dan Coroni

0.0 from 0 votes

I made an Easy Crockpot Soup that turns boring weeknights into a dinner people actually ask for seconds of.

Servings

servings

Calories

260

kcal

Equipment: 1. Slow cooker or crockpot (where the soup finishes cooking)
2. 10 to 12 inch skillet or sauté pan for browning the veggies
3. Cutting board (preferably one for veggies)
4. Chef’s knife for dicing onion, carrots and celery
5. Wooden spoon or silicone spatula to stir and scrape browned bits
6. Measuring cups and spoons for broth, lentils and spices
7. Can opener for the diced tomatoes
8. Colander or fine mesh sieve to rinse the lentils
9. Ladle for serving the soup
10. Potato masher or immersion blender if you want a creamier texture

Ingredients

1 1/2 cups dried brown or green lentils, rinsed
6 cups vegetable broth (low sodium preferred)
1 large yellow onion, diced
3 medium carrots, peeled and diced
2 celery stalks, diced
3 garlic cloves, minced
1 14.5 oz can diced tomatoes, undrained
2 tablespoons tomato paste
2 tablespoons olive oil
1 teaspoon dried thyme
1 teaspoon ground cumin
1/2 teaspoon smoked paprika (optional but recommended)
1 bay leaf
1 1/2 teaspoons kosher salt, plus more to taste
1/2 teaspoon freshly ground black pepper
1/4 teaspoon red pepper flakes (optional, for a little heat)
2 tablespoons fresh lemon juice (to finish, optional)
1/4 cup fresh parsley, chopped (for garnish, optional)

Directions

In a skillet heat the olive oil over medium heat, add the diced onion, carrots and celery and cook until softened, about 5 to 7 minutes; stir in the minced garlic and cook 30 seconds more, just until fragrant.
Stir in the tomato paste, cooking 1 minute to deepen the flavor, then add the canned diced tomatoes (with their juices) and mix to combine.
Transfer the vegetable mixture to the crockpot, add the rinsed lentils, vegetable broth, dried thyme, ground cumin, smoked paprika, bay leaf, red pepper flakes if using, kosher salt and black pepper.
Give everything a good stir, scrape any browned bits from the skillet into the crockpot, then cover and cook on low for 6 to 8 hours or on high for 3 to 4 hours, until lentils are tender but not mushy.
Check the soup about halfway through cooking to make sure there is enough liquid; if it seems too thick add up to 1 cup more broth or water and stir.
When the lentils are tender taste and adjust seasoning, adding more salt, pepper or red pepper flakes if you want more heat.
Remove and discard the bay leaf, then stir in the fresh lemon juice to brighten the flavors if using; lemon really wakes this soup up so dont skip it if you like a little tang.
For a creamier texture mash a cup of the soup with a potato masher or use an immersion blender for a few pulses, but dont over-blend unless you want a puree.
Ladle into bowls and garnish with chopped fresh parsley. Serve with crusty bread or over rice for a heartier meal, and enjoy the leftovers because it only gets better the next day.

Notes

Below you’ll find my best estimate of this recipe’s nutrition facts. Treat the numbers as a guide rather than a rule—great food should nourish both body and spirit. Figures are approximate, and the website owner assumes no liability for any inaccuracies in this recipe.