There are some meals that feel like a warm hug in a bowl, and for me, this Lentil Soup with Carrots and Celery is the absolute embodiment of that feeling. It’s the kind of dish we turn to when the evenings draw in and a chill hangs in the air. This isn’t just any vegetable soup; it’s a robust, deeply savoury, and nourishing meal built on a foundation of humble, yet powerful, ingredients. I used to struggle with making lentil soup that had real depth of flavour; mine often turned out a bit flat until I discovered the importance of building the base properly. This recipe is the culmination of that learning process.

What makes this particular Lentil Soup so special is the way the sweet carrots, earthy celery, and sharp onions melt together to create a classic mirepoix base. This simple trio, when cooked slowly, provides an incredible backbone of flavour that elevates the entire dish. The green lentils simmer until they are perfectly tender, giving the soup a satisfying texture that’s hearty without being heavy. It’s a naturally vegan soup that is packed with plant-based goodness, making it a brilliant option for almost everyone.

This recipe is ideal when you want a wholesome and satisfying meal that doesn’t require complex steps. It works beautifully for a weekday supper, a warming lunch, and it’s a fantastic candidate for meal prepping, as the flavours actually improve overnight. Whether you’re a seasoned cook or just starting out, this soup is a wonderfully rewarding dish to make.

Recipe Overview

This Lentil Soup with Carrots and Celery is a one-pot meal that delivers rich, savoury flavours from a simple list of ingredients. The taste is earthy from the lentils, with a subtle sweetness from the carrots and a herby background note from thyme and bay. After years of testing, I found that a tiny splash of vinegar at the end really makes all the other flavours pop. You can expect a thick, textured soup that is incredibly satisfying.

• Prep Time: 15 minutes
• Cook Time: 40 minutes
• Total Time: 55 minutes
• Servings: 6 people
• Difficulty: Easy

Why You’ll Love This Lentil Soup Carrots Celery

• Genuine Flavour: We slowly sweat the carrots, celery, and onion to build a deeply savoury foundation. This process, known as a mirepoix, is the key to a soup that tastes like it has been simmering for hours. The smoked paprika adds a subtle warmth that rounds everything out.
• Ready in Under an Hour: From chopping the first onion to ladling the finished soup into bowls, the entire process takes about 55 minutes, making it very achievable for a weeknight.
• Flexible Recipe: This soup is a brilliant canvas for customisation. You can wilt in a few handfuls of fresh spinach at the end, add a cup of diced potatoes with the lentils for extra substance, or stir in a swirl of coconut cream for a richer finish.
• Great for Meal Prep: This soup is fantastic for making on a Sunday to enjoy for lunches throughout the week. The texture holds up well, and as the flavours meld, it tastes even better on day two or three.
• Family Tested: This is a staple in our house. My husband, who’s usually picky about soup, asked for seconds the first time I made it this way! It’s one of those recipes that everyone seems to love.

Lentil Soup Carrots Celery

⏱️ 15 min prep  •  🍳 40 min cook  •  👥 6 servings

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Ingredients You’ll Need

We’re using simple, wholesome ingredients you can find in any supermarket. For the stock, I recommend using a good quality, low-sodium vegetable stock cube or pot, like Kallo or Marigold, as it forms the liquid base of our soup. The quality really makes a difference here.

• 2 tbsp olive oil
• 1 large onion, finely chopped
• 3 medium carrots, diced (about 250g)
• 3 celery sticks, diced (about 200g)
• 4 cloves garlic, minced
• 250g dried green or brown lentils, rinsed
• 1.5 litres vegetable stock
• 400g tin of chopped tomatoes
• 1 tsp dried thyme
• 1 bay leaf
• ½ tsp smoked paprika
• 1 tsp sea salt, plus more to taste
• ½ tsp freshly ground black pepper
• 1 tbsp red wine vinegar (or lemon juice)
• A small bunch of fresh parsley, chopped, to serve

Adam’s Tip: Don’t skip rinsing your lentils! Place them in a fine-mesh sieve and run them under cold water for about a minute. This removes any dust or debris and helps prevent the soup from becoming foamy or murky as it cooks.

How to Make Lentil Soup Carrots Celery

The process for this soup is straightforward. It all happens in one pot, which means less washing up. We focus on gently cooking the vegetables first to build that all-important flavour base before adding the liquids and lentils to simmer.

1. Sauté the Base Vegetables: Heat the olive oil in a large stockpot or Dutch oven over a medium heat. Add the chopped onion, carrots, and celery. Cook, stirring occasionally, for 8-10 minutes until the vegetables have softened and the onion is translucent. We’re not looking for colour here, just for them to soften and release their sweetness.
2. Add Aromatics: Add the minced garlic and smoked paprika to the pot. Stir continuously and cook for another minute until the garlic is fragrant. Be careful not to let it burn.
3. Combine Ingredients: Pour in the vegetable stock and the tin of chopped tomatoes. Add the rinsed lentils, dried thyme, and the bay leaf. Give everything a good stir to combine.
4. Simmer the Soup: Increase the heat to bring the soup to a boil, then immediately reduce the heat to low. Cover the pot and let it simmer gently for 35-40 minutes, or until the lentils are completely tender. A gentle simmer is key to keeping the lentils intact.
5. Season and Finish: Once the lentils are cooked, remove the pot from the heat and take out the bay leaf. Stir in the salt, black pepper, and the red wine vinegar. I find that this final splash of acidity is crucial—it brightens up all the earthy flavours beautifully.
6. Adjust Texture (Optional): For a slightly creamier texture, you can use an immersion blender to pulse the soup a few times directly in the pot. I like to blend about a quarter of it, leaving the rest chunky for a great mouthfeel.
7. Serve: Taste the soup one last time and adjust the seasoning if needed. Ladle into warm bowls and garnish generously with fresh chopped parsley before serving.

Tips From My Kitchen

• Temperature Control: Once the soup comes to a boil, it’s vital to reduce the heat to a low simmer. Boiling lentils vigorously can cause them to burst and turn to mush, which will change the final texture of the soup.
• The Secret Step: Don’t skip the final addition of red wine vinegar or lemon juice. I learned that this tiny amount of acid at the end cuts through the richness and makes the entire soup taste more vibrant and balanced. It’s a game-changer.
• Make-Ahead: The entire soup can be made up to 4 days in advance and stored in the fridge. The flavours will deepen overnight. You can also chop the onion, carrots, and celery a day or two ahead of time and keep them in an airtight container in the fridge.
• Storage: Let the soup cool completely before transferring it to an airtight container. It will keep well in the refrigerator for up to 5 days. It also freezes brilliantly for up to 3 months. Note that the soup will thicken as it cools; simply add a splash of water or stock when reheating.

Equipment You’ll Need

• Large stockpot or Dutch oven
• Immersion blender (optional, for a creamier texture)
• Ladle
• Sharp knife and cutting board

Delicious Variations to Try

This recipe is a wonderful starting point. Once you’ve got the base right, feel free to experiment with these additions.

• Spicy Version: For a gentle heat, add ½ teaspoon of red pepper flakes along with the garlic and paprika. If you like it hotter, add a finely chopped red chilli.
• Extra Greens: To boost the nutritional value, stir in 2-3 large handfuls of fresh spinach or chopped kale in the last 5 minutes of cooking, allowing it to wilt into the hot soup.
• Add some Protein: While the soup is hearty on its own, you can add crumbled cooked chorizo or smoked sausage for a meaty, smoky flavour. For a poultry option, stir in some shredded leftover roast chicken at the end.

What to Serve With Lentil Soup Carrots Celery

This soup is a complete meal, but a few simple accompaniments can make it even better. Here are a few of our favourites:

• Crusty Bread: A thick slice of warm, crusty sourdough or a wholemeal baguette is non-negotiable in our house. It’s ideal for mopping up every last drop from the bowl.
• A Fresh Salad: A simple green salad provides a lovely, crisp contrast to the warm soup. This Classic House Salad with Red Wine Vinaigrette works perfectly.
• A Dollop of Yoghurt: A spoonful of plain Greek yoghurt or a plant-based alternative adds a creamy tang that complements the earthy lentils.

Frequently Asked Questions

Lentil Soup Carrots Celery

A deeply savoury and hearty lentil soup built on a classic mirepoix of carrots, celery, and onion. This comforting soup is ready in under an hour, making it perfect for a weeknight meal.

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Prep Time 15 minutes mins

Cook Time 40 minutes mins

Total Time 55 minutes mins

Servings: 6 servings

Course: Main Course

Cuisine: International

Calories: 260

Ingredients Method Notes

Ingredients

  

• 2 tbsp olive oil
• 1 large onion finely chopped
• 3 medium carrots diced (about 250g)
• 3 celery sticks diced (about 200g)
• 4 cloves garlic minced
• 250 g dried green or brown lentils rinsed
• 1.5 litres vegetable stock
• 400 g tin of chopped tomatoes
• 1 tsp dried thyme
• 1 bay leaf
• ½ tsp smoked paprika
• 1 tsp sea salt plus more to taste
• ½ tsp freshly ground black pepper
• 1 tbsp red wine vinegar or lemon juice
• A small bunch of fresh parsley chopped, to serve
• Genuine Flavour: We slowly sweat the carrots celery, and onion to build a deeply savoury foundation. This process, known as a mirepoix, is the key to a soup that tastes like it has been simmering for hours. The smoked paprika adds a subtle warmth that rounds everything out.
• Ready in Under an Hour: From chopping the first onion to ladling the finished soup into bowls the entire process takes about 55 minutes, making it very achievable for a weeknight.
• Flexible Recipe: This soup is a brilliant canvas for customisation. You can wilt in a few handfuls of fresh spinach at the end add a cup of diced potatoes with the lentils for extra substance, or stir in a swirl of coconut cream for a richer finish.
• Great for Meal Prep: This soup is fantastic for making on a Sunday to enjoy for lunches throughout the week. The texture holds up well and as the flavours meld, it tastes even better on day two or three.
• Family Tested: This is a staple in our house. My husband who's usually picky about soup, asked for seconds the first time I made it this way! It’s one of those recipes that everyone seems to love.

Method

 

1. Sauté the Base Vegetables: Heat the olive oil in a large stockpot or Dutch oven over a medium heat. Add the chopped onion, carrots, and celery. Cook, stirring occasionally, for 8-10 minutes until the vegetables have softened and the onion is translucent. We're not looking for colour here, just for them to soften and release their sweetness.
2. Add Aromatics: Add the minced garlic and smoked paprika to the pot. Stir continuously and cook for another minute until the garlic is fragrant. Be careful not to let it burn.
3. Combine Ingredients: Pour in the vegetable stock and the tin of chopped tomatoes. Add the rinsed lentils, dried thyme, and the bay leaf. Give everything a good stir to combine.
4. Simmer the Soup: Increase the heat to bring the soup to a boil, then immediately reduce the heat to low. Cover the pot and let it simmer gently for 35-40 minutes, or until the lentils are completely tender. A gentle simmer is key to keeping the lentils intact.
5. Season and Finish: Once the lentils are cooked, remove the pot from the heat and take out the bay leaf. Stir in the salt, black pepper, and the red wine vinegar. I find that this final splash of acidity is crucial—it brightens up all the earthy flavours beautifully.
6. Adjust Texture (Optional): For a slightly creamier texture, you can use an immersion blender to pulse the soup a few times directly in the pot. I like to blend about a quarter of it, leaving the rest chunky for a great mouthfeel.
7. Serve: Taste the soup one last time and adjust the seasoning if needed. Ladle into warm bowls and garnish generously with fresh chopped parsley before serving.

Notes

This soup is fantastic for making ahead. As the flavours meld, it tastes even better on day two or three, making it great for meal prep.

I really hope you enjoy making this Lentil Soup with Carrots and Celery. It’s a simple, honest, and deeply nourishing dish that has brought a lot of warmth to our family table, and I hope it does for yours too. If you’re looking for other comforting meals, you might also like our Creamy Garlic Penne Pasta. Please let me know how you get on in the comments below – I love hearing from you!

– Adam Henderson