Lentil soup with cheddar is a brothy vegetable soup with potatoes, carrots, celery, and green or brown lentils. A small cheese-and-sour-cream finish adds richness without turning it into a thick cheese sauce. Dried thyme and marjoram season the vegetable stock.
The half cup of dry lentils is intentional alongside six cups stock and several vegetables. Expect a light soup with lentils distributed through the broth. This is neither a dense lentil purée nor a dairy-free recipe.

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Why This Recipe Works
Softening onion and celery in measured oil before adding liquid builds a savory base. Lentil soup with cheddar cooks best when the potatoes are small even cubes and carrots are thinly sliced. Large vegetable pieces can remain firm after smaller ones have softened.
Green and brown lentils tend to hold their shape, which suits the brothy texture. Red split lentils break down differently and should not be assumed to behave identically. Finishing the dairy off heat reduces the chance of separated sour cream or a grainy cheese texture.
Ingredients for Lentil Soup With Cheddar
Use two tablespoons olive oil for the initial sauté, not an unlisted splash. Prepare one medium onion, three garlic cloves, two celery stalks, one and a half cups half-inch potato cubes, and two thinly sliced carrots. Measure potatoes after cutting rather than relying on a variable count of small potatoes.
For lentil soup with cheddar, rinse and inspect half a cup dry green or brown lentils. Use half a teaspoon each dried thyme and marjoram. A quarter teaspoon salt is a starting amount that may be reduced with salty stock. The third cup cheddar and two tablespoons sour cream are finishing ingredients, not bowls of individual toppings.
Soup Base
- 2 tablespoons olive oil
- 1 medium onion (chopped)
- 3 cloves garlic (minced)
- 2 stalks celery (finely chopped)
- 1½ cups potato cubes (½ inch)
- 2 medium carrots (thinly sliced)
- ½ cup dry green or brown lentils (rinsed and checked)
- ½ teaspoon dried thyme
- ½ teaspoon dried marjoram
- 6 cups vegetable stock
- ¼ teaspoon salt (or less with salty stock)
Off-Heat Finish
- ⅓ cup finely grated cheddar (vegetarian-suitable if required)
- 2 tablespoons sour cream
How to Make Lentil Soup With Cheddar
Warm olive oil in a large pot over medium heat. Cook chopped onion and celery for five to seven minutes until beginning to soften. Add minced garlic and stir for about thirty seconds without letting it scorch. Add potato cubes, thin carrot slices, rinsed lentils, herbs, stock, and the measured starting salt.
Bring to a gentle boil, then reduce to a steady simmer. Cook lentil soup with cheddar for about thirty to forty minutes, stirring occasionally, until both lentils and potatoes are tender. Older lentils can take longer, so bite or press a sample rather than stopping at an arbitrary minute.
Remove from heat and rest five minutes. Stir in the grated cheese until melted. In a small bowl whisk the sour cream with a quarter cup of hot soup liquid, then stir that tempered mixture back into the pot. Taste the finished broth before adding any further seasoning.
How to Serve
Ladle lentil soup with cheddar into six bowls, stirring the pot gently first so vegetables and lentils do not all remain at the bottom. Serve with bread or a separate salad. The soup is light enough to accompany a larger meal rather than automatically supplying a high-protein main course.
Keep the finished soup over gentle heat only if needed for immediate service. A prolonged rolling boil after adding cheese and sour cream can change the texture. If it stands and thickens, stir before deciding whether any additional liquid is needed.
Storage
Refrigerate lentil soup with cheddar within two hours in shallow containers at 40°F or colder. Use within three days. A large deep pot cools more slowly, so divide it rather than waiting on the counter until it feels completely cold.
Reheat while stirring to 165°F, bringing soup to a boil for safe reheating, then remove from heat rather than boiling it hard for a long time. Freeze portions for up to two months for quality if desired, expecting some dairy separation and softer vegetables. Thaw in the refrigerator.
The FDA safe food handling guidance explains prompt refrigeration and temperature checks for perishable foods.
Tips and Variations
For lentil soup with cheddar, grate the cheese finely so it melts into the hot broth without extended boiling. Tempering the sour cream with hot liquid helps it combine more smoothly. Neither step requires adding extra cream or flour to the ingredient list.
Use vegetable stock and check cheese labels if serving someone who requires vegetarian rennet. The recipe includes dairy and is not vegan. Resist calling the soup protein-rich without a reliable nutrition calculation; its useful description is the actual mixture of lentils, vegetables, and dairy.
Frequently Asked Questions
Is lentil soup with cheddar thick?
It is deliberately brothy, with half a cup dry lentils and six cups stock plus vegetables.
Which lentils are specified?
Use green or brown lentils, rinsed and checked. Red split lentils break down differently.
When does the cheese go in?
After the soup is cooked and has rested off heat for five minutes.
How much oil is used for the vegetables?
Two tablespoons olive oil are included for the initial onion-and-celery sauté.
Why temper the sour cream?
Whisking it with a little hot broth before returning it to the pot helps it blend more smoothly.
More Recipes to Try
- Curry Lentil Soup
- Green Lentil and Potato Casserole with Cheese
- Lentil Tabbouleh Salad
- Mediterranean Lentils and Rice

Lentil Soup with Cheddar, Sour Cream and Potatoes
Ingredients
Soup Base
- 2 tablespoons olive oil
- 1 medium onion chopped
- 3 cloves garlic minced
- 2 stalks celery finely chopped
- 1½ cups potato cubes ½ inch
- 2 medium carrots thinly sliced
- ½ cup dry green or brown lentils rinsed and checked
- ½ teaspoon dried thyme
- ½ teaspoon dried marjoram
- 6 cups vegetable stock
- ¼ teaspoon salt or less with salty stock
Off-Heat Finish
- ⅓ cup finely grated cheddar vegetarian-suitable if required
- 2 tablespoons sour cream
Instructions
- Heat 2 tablespoons olive oil in a large pot. Sauté onion and celery over medium heat for 5–7 minutes. Stir in garlic for 30 seconds.
- Add ½-inch potato cubes, thin carrot slices, rinsed lentils, thyme, marjoram, vegetable stock, and the measured starting salt, reducing it if the stock is salty. Bring to a gentle boil.
- Reduce to a simmer and cook 30–40 minutes, or longer until lentils and potatoes are tender, stirring occasionally.
- Remove from heat for 5 minutes. Stir in cheddar. Whisk sour cream with ¼ cup hot broth in a separate bowl, then stir it into the soup. Taste and divide into 6 bowls.



