AI-generated serving inspiration; not a photograph of a tested recipe.
Brown or green lentils hold a little shape after a long cook. This soup starts with a generous amount of broth because the lentils absorb liquid as they soften; lemon at the end keeps the earthy flavors from tasting flat.
An original demonstration recipe, not independently kitchen-tested. Images are AI-generated serving inspiration, not photographs of tested recipes. Our editorial approach.
Why you’ll love this recipe
Lentils do not need an overnight soak.
A squeeze of lemon lifts the finished soup.
Ingredient notes
Red lentils break down faster; use brown or green lentils here.
Sort lentils for small stones before rinsing.
Equipment you’ll need
6-quart slow cooker
Fine-mesh strainer
Ladle
Helpful cooking tips
Older lentils may take longer to soften.
Check the broth label if cooking for a dietary restriction.
Make it your own
Variations
Add 1/2 tsp smoked paprika with the cumin.
Substitutions
Use chopped kale instead of spinach and give it 15 minutes to soften.
What to serve with it
Serve with whole-grain bread and a tomato salad.
Storage, freezing & reheating
In the refrigerator
Divide leftovers into shallow containers and refrigerate within 2 hours (within 1 hour if above 90°F / 32°C). Keep at 40°F / 4°C or colder and use within 3–4 days.
In the freezer
Freeze cooled portions in sealed freezer containers for up to 2 months for best quality. Thaw overnight in the refrigerator.
To reheat
Reheat a single portion in the microwave, loosely covered, stirring or turning halfway through. Heat to 165°F / 74°C throughout; add a spoonful of water if needed.
Frequently asked questions
Will it thicken overnight?
Yes. Lentils keep absorbing liquid, so add water or broth when reheating.
Let’s get cooking
Slow Cooker Lentil Soup
Brown lentils and diced vegetables simmer into a hearty, economical soup.
Prep time
15 min
Cook time
7 hrs 5 min
Total time
7 hrs 20 min
Servings
6
Difficulty
Easy
Cuisine
American home cooking
Original demonstration recipe, developed with AI assistance and not independently kitchen-tested.
Equipment
6-quart slow cooker · Fine-mesh strainer · Ladle
Ingredients
US customary measurements. Check off ingredients as you go.
Step-by-step instructions
Put lentils, carrots, celery, onion, garlic, tomatoes, broth, oregano, cumin, and salt in a 6-quart slow cooker.
Cover and cook on LOW for 6–7 hours, until lentils and carrots are tender.
Stir in spinach and cook covered for another 5 minutes until wilted.
Stir in lemon juice and taste. Add hot water, 1/4 cup at a time, if the soup is too thick.
Cook’s notes
Older lentils may take longer to soften.
Check the broth label if cooking for a dietary restriction.
Store: Divide leftovers into shallow containers and refrigerate within 2 hours (within 1 hour if above 90°F / 32°C). Keep at 40°F / 4°C or colder and use within 3–4 days.
Reheat: Reheat a single portion in the microwave, loosely covered, stirring or turning halfway through. Heat to 165°F / 74°C throughout; add a spoonful of water if needed.
The Everyday Table · https://theeverydaytable.xyz/recipes/slow-cooker-lentil-soup.php
A reliable food thermometer takes the guesswork out of cooking. Choose sturdy measuring cups and lidded, shallow containers for leftovers. Use the pan size listed in the recipe for the best fit.
