There is nothing better than a soup you can assemble in fifteen minutes flat and forget about until dinner. This Slow Cooker Chicken and Lentil Soup is exactly that: raw chicken breasts, dried lentils, aromatics, and broth go into the crockpot, and seven hours later you have a thick, savory, stick-to-your-ribs soup that tastes like it simmered all day on the stove.
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Lentils are the quiet hero here. Unlike beans, they need no soaking, they break down just enough to thicken the broth naturally, and they soak up the herby, tomatoey base like little sponges. The chicken stays whole during cooking so it stays juicy, then gets shredded right in the pot at the very end.
It is a one-pot, freezer-friendly, high-protein meal that costs pennies per bowl. Serve it with crusty bread for a cozy weeknight dinner, or portion it into containers for a week of grab-and-go lunches.
Why You'll Love This Recipe
About the Ingredients
1.5 lbs (680g) boneless, skinless chicken breasts
Buy breasts of even thickness so they cook evenly; thighs work too and stay even juicier. Look for air-chilled chicken for cleaner flavor.
1 cup (200g) dried brown or green lentils, rinsed
Brown and green lentils hold their shape best here; red lentils turn mushy, so save them for dal. Skip any lentils labeled 'quick-cooking.'
1 medium yellow onion (about 1 cup / 150g), diced
A sweet onion is a fine swap if yellow makes your eyes water; frozen diced onion (about 1 cup) works in a pinch with no extra liquid needed.
3 medium carrots (about 1 cup / 130g), peeled and diced
Use whole carrots rather than baby carrots, which stay firm and bland; parsnips make a lovely earthy substitute.
2 celery stalks (about 1 cup / 100g), diced
Include the leafy tops for extra flavor; fennel bulb is a good swap if you are out of celery.
3 garlic cloves, minced
Fresh garlic is best, but 1 teaspoon garlic powder can substitute in a pinch; add it with the dry spices.
1 can (14.5 oz / 411g) diced tomatoes, undrained
Fire-roasted diced tomatoes add a subtle smoky depth; do not drain them, the juice is part of the broth.
6 cups (1.4L) low-sodium chicken broth
Use vegetable broth to make it vegetarian; if using regular broth, reduce the added salt to 1/2 teaspoon.
1 teaspoon dried oregano
Crush it between your palms before adding to release the oils; Italian seasoning blends work as a 1:1 swap.
1 teaspoon ground cumin
Toast whole seeds and grind them for a brighter flavor; smoked paprika can replace half the cumin for a smoky note.
1 teaspoon kosher salt, plus more to taste
Kosher salt dissolves more evenly than table salt in a slow cooker; if using fine table salt, start with 3/4 teaspoon.
1/2 teaspoon black pepper
Freshly cracked pepper is worth it here; white pepper gives a milder heat if you prefer.
Tips & Tricks
Keep the lid closed
Every peek releases trapped heat and adds 15 to 20 minutes to the cook time, so resist stirring until the final hour.
Shred the chicken in the pot
Pull the breasts out with tongs, shred with two forks, and return them; this keeps the soup brothy instead of cloudy.
Check your lentil type
Brown and green lentils take 7 to 8 hours on low, but red lentils collapse into mush in about 5, so match your time to your lentil.
- Do not add the salt early with the lentils: Salting lentils heavily at the start can toughen their skins, so hold most of the salt until the end and taste before serving.
Pro Tips
Step-by-Step Instructions
1. Layer the lentils
Rinse the lentils under cool water and scatter them across the bottom of a 6-quart slow cooker. This puts them closest to the heating element so they cook evenly and thicken the broth.
2. Add the vegetables
Pile the diced onion, carrots, celery, and minced garlic on top of the lentils, then pour in the undrained diced tomatoes.
3. Season the broth
Pour in the chicken broth and stir in the oregano, cumin, 1 teaspoon salt, and pepper until everything is submerged.
4. Nestle the chicken
Lay the chicken breasts on top of the vegetables in a single layer, pressing them just below the broth line. Do not stir them in, keeping them whole keeps them juicy.
5. Slow cook on low
Cover and cook on LOW for 7 to 8 hours or on HIGH for 4 to 5 hours, until the lentils are completely tender and the chicken reaches 165F (74C) on an instant-read thermometer. The broth should look thick and the lentils should mash easily against the side of the pot.
6. Shred the chicken
Transfer the chicken to a cutting board and shred it with two forks, then return it to the pot. Stir well so the shredded meat distributes evenly.
7. Brighten and season
Stir in a squeeze of fresh lemon juice, taste, and add salt and pepper as needed. The acid should make the broth taste noticeably brighter.
8. Serve hot
Ladle into bowls and top with fresh parsley, a swirl of olive oil, or grated parmesan. Serve with crusty bread for dipping.
Delicious Variations
Mexican-Inspired
Swap cumin for chili powder, add a can of green chiles, and finish with lime juice and cilantro.
Coconut Curry
Replace 2 cups of broth with coconut milk, add 2 teaspoons curry powder, and stir in baby spinach at the end.
Italian Wedding Style
Add 2 cups of chopped kale in the last 30 minutes and finish with lemon zest and parmesan.
How to Store Slow Cooker Chicken and Lentil Soup
Refrigerator
Store in an airtight container in the refrigerator for up to 4 days. The soup thickens as it sits, so loosen it with a splash of broth when reheating.
Freezer
Freeze in portioned containers for up to 3 months. Leave 1 inch of headspace for expansion and thaw overnight in the refrigerator before reheating.
Reheating
Reheat gently on the stovetop over medium-low heat or in the microwave, stirring in hot broth or water a few tablespoons at a time until it reaches a loose, soupy consistency.
Frequently Asked Questions
Q: Can I put raw chicken in the slow cooker for soup?
Yes, raw chicken breasts can go straight into the slow cooker and will safely reach 165F (74C) during the long cook time. Keep them whole and submerged in the broth for even cooking, then shred at the end.
Q: Do I need to soak lentils before adding them to the slow cooker?
No, brown and green lentils do not need soaking and can go in dry. Just rinse them under cool water to remove dust and any stray stones before adding them to the pot.
Q: Why did my lentil soup turn out mushy?
Mushy soup usually means red lentils were used or the soup cooked too long on high. Stick with brown or green lentils and use the low setting for 7 to 8 hours for the best texture.
Q: How do I make this slow cooker chicken and lentil soup vegetarian?
Swap the chicken for 2 cans of drained chickpeas and use vegetable broth instead of chicken broth. Add the chickpeas in the last hour so they hold their shape.
Q: Can I double this recipe in a 6-quart slow cooker?
Do not double it in a 6-quart slow cooker, it will overflow. Use an 8-quart slow cooker for a double batch, or make two smaller batches in separate pots.
If you make this Slow Cooker Chicken and Lentil Soup, snap a photo and tag me on social media, I love seeing your cozy bowls. Save this recipe for your next busy week and let the crockpot do the work.
Slow Cooker Chicken and Lentil Soup
This Slow Cooker Chicken and Lentil Soup is a hearty, protein-packed dump-and-go crockpot recipe with tender chicken, earthy lentils, and cozy spices.
🧂 Ingredients
- 1.5 lbs (680g) boneless, skinless chicken breasts
- 1 cup (200g) dried brown or green lentils, rinsed
- 1 medium yellow onion (about 1 cup / 150g), diced
- 3 medium carrots (about 1 cup / 130g), peeled and diced
- 2 celery stalks (about 1 cup / 100g), diced
- 3 garlic cloves, minced
- 1 can (14.5 oz / 411g) diced tomatoes, undrained
- 6 cups (1.4L) low-sodium chicken broth
- 1 teaspoon dried oregano
- 1 teaspoon ground cumin
- 1 teaspoon kosher salt, plus more to taste
- 1/2 teaspoon black pepper
📋 Instructions
- 1Layer the lentils — Rinse the lentils under cool water and scatter them across the bottom of a 6-quart slow cooker. This puts them closest to the heating element so they cook evenly and thicken the broth.
- 2Add the vegetables — Pile the diced onion, carrots, celery, and minced garlic on top of the lentils, then pour in the undrained diced tomatoes.
- 3Season the broth — Pour in the chicken broth and stir in the oregano, cumin, 1 teaspoon salt, and pepper until everything is submerged.
- 4Nestle the chicken — Lay the chicken breasts on top of the vegetables in a single layer, pressing them just below the broth line. Do not stir them in, keeping them whole keeps them juicy.
- 5Slow cook on low — Cover and cook on LOW for 7 to 8 hours or on HIGH for 4 to 5 hours, until the lentils are completely tender and the chicken reaches 165F (74C) on an instant-read thermometer. The broth should look thick and the lentils should mash easily against the side of the pot.
- 6Shred the chicken — Transfer the chicken to a cutting board and shred it with two forks, then return it to the pot. Stir well so the shredded meat distributes evenly.
- 7Brighten and season — Stir in a squeeze of fresh lemon juice, taste, and add salt and pepper as needed. The acid should make the broth taste noticeably brighter.
- 8Serve hot — Ladle into bowls and top with fresh parsley, a swirl of olive oil, or grated parmesan. Serve with crusty bread for dipping.
