Lentil and Sausage Soup (Creamy Red Lentils, One Pot)

This Lentil and Sausage Soup is the kind of dinner that makes the whole house smell amazing on a chilly night. Crumbled Italian sausage, tender carrots, celery and onion, and red lentils all simmer together in one pot. The lentils slowly break down into a thick, creamy, cozy broth.

Most lentil soups use brown or green lentils and get blended to thicken them. This one skips all that. Red lentils do the work for you because they naturally break down when simmered. The result is a velvety, stew-like soup without pulling out a blender. A splash of red wine vinegar at the end wakes everything up, and fresh parsley keeps it bright. Serve it with toasted bread for dunking and you’ve got a satisfying dinner everyone will ask for again.

How I served it to my family

Soup is not always a winner with toddlers, BUT I did get my boys to eat a few bites of this one because they absolutely love sausage. Whenever I serve soup to my kids I drain out as much liquid as possible so that they can pick through and enjoy some of the solid pieces like the sausage in this soup. They also LOVED the buttery bread on the side. For me and my wife I added a drizzle of heavy creamy, fresh herbs, fresh cracked black pepper, and, of course, more of that delicious bread.

I recommend making a loaf of my overnight bread to serve with this soup. Serve something like this lemon kale caesar salad on the side to add more veggies to this meal and balance out the richness of the soup.

If you are looking for another kid-friendly sausage soup, try this Creamy Sausage and Potato Soup.

Ingredients You’ll Need

Here’s a quick look at the ingredients you need to make this red lentil and sausage soup.

• Ground mild Italian sausage – Ground sausage is used instead of sausage links for easier prep. If you only have links, just cut the casing off and break the meat into crumbles as it cooks. Mild Italian sausage gives the most balanced flavor but hot Italian sausage works great if you like more spice.
• Olive oil – Used to saute the vegetables after browning the sausage. The oil picks up all the browned bits left in the pan from the sausage which adds incredible flavor to the soup base.
• Carrots, celery, and yellow onion – The classic mirepoix base. Dice everything to a similar size so it cooks evenly and softens at the same rate.
• Tomato paste – A small amount of tomato paste adds a deep, rich tomato flavor that anchors the whole broth. Cook it in the pan for a full minute before adding the liquid. This step cooks out the raw, tinny flavor of the tomato paste and deepens its flavor significantly. It is a small step that makes a big difference in the final taste of the soup.
• Kosher salt, black pepper, and smoked paprika – The simple spice blend that seasons the soup. The smoked paprika adds a subtle smokiness that complements the Italian sausage beautifully.
• Red lentils – The star of this soup. Red lentils are a smaller, split variety of lentil that cook faster than green or brown lentils and break down almost completely when simmered. This is what gives the soup its naturally creamy, thick consistency without any blending or adding cream. Make sure to rinse them thoroughly under cold water before adding to the pot as they can be dusty.
• Chicken broth and water – Together these form the liquid base of the soup. Use a good quality chicken broth since it makes up most of the flavor of the broth.
• Red wine vinegar – This is the secret finishing ingredient. Stirring in a small amount of red wine vinegar at the very end of cooking adds a brightness and acidity that balances the richness of the sausage and lentils and makes every bowl taste vibrant.
• Fresh parsley – Stirred in at the very end along with the vinegar, fresh parsley adds a pop of freshness and color that finishes the soup beautifully.

For another fall dish with lentils, try this Roasted Beet and Lentil Chopped Salad recipe.

Substitutions and Variations

• Spicy sausage: Swap in hot Italian sausage, or add a pinch of red pepper flakes with the paprika.
• Lighter sausage: Ground turkey or chicken Italian sausage works well. Add a little extra olive oil when browning, since it’s leaner.
• Add greens: Stir in a few big handfuls of baby spinach or chopped kale at the end and let them wilt for a few minutes.
• Vegetable broth: Use it in place of chicken broth if that’s what you have on hand.
• Garlic lovers: [Add 2–3 minced cloves with the tomato paste.]
• Lemon instead of vinegar: A squeeze of fresh lemon juice works in place of the red wine vinegar.

How to make lentil and sausage soup

Step 1: Brown the sausage. Crumble it into a heavy-bottomed pot and cook until browned, then remove it and set it aside.

Step 2: Soften the veggies. Add olive oil, carrot, celery and onion and sauté until soft and fragrant, about 7 minutes.

Step 3: Bloom the tomato paste and spices. Stir in the tomato paste, salt, pepper and smoked paprika and cook for a minute. Then add the broth, water, lentils and sausage.

Step 4: Simmer. Bring it to a boil, cover, reduce to a simmer and let it go for 1 hour, until the lentils have broken down and the soup is thick.

Finish. Turn off the heat and stir in the red wine vinegar and parsley.

Lentil and Sausage soup FAQs

Do I need to soak red lentils?

No. Red lentils cook quickly and don’t need soaking. Just rinse them well before adding them to the pot.

Why did my lentil soup get so thick?

Red lentils continue to absorb liquid as the soup sits. That’s totally normal! Stir in some broth or water when reheating to loosen it up.

Is lentil and sausage soup gluten-free?

It can be. Lentils, vegetables and spices are naturally gluten-free, but check the labels on your sausage and broth, since some brands contain gluten.

What kind of sausage is best?

Mild Italian sausage is my favorite here because it seasons the whole pot without overpowering the lentils. Hot Italian sausage is great if you like some heat.

Storage, freezing and Reheating

• Fridge: Store leftovers in an airtight container for up to 4–5 days.
• Reheating: Red lentils keep absorbing liquid as the soup sits, so it will be much thicker the next day. Add a splash of broth or water as you reheat on the stove or in the microwave until it’s the consistency you like.
• Freezing: Let the soup cool completely, then freeze it in airtight containers or freezer bags for up to 3 months. Thaw it overnight in the fridge and reheat with a little extra broth.
• Meal prep: This soup tastes even better the next day, so it’s a great one to make on Sunday for easy lunches all week.