This fennel leek soup is creamy, light, and comforting with a very European feel. A delicious spring recipe that shows how to use leeks and fennel in a simple, nourishing way.

Table of Contents

Fennel Leek Soup

As a nutrition consultant and chef, I’m always looking for ways to turn humble vegetables into something that feels luxurious, comforting, and just a little bit special. And this fennel leek soup does exactly that. I love leeks; they were such a popular vegetable in Poland when I was growing up, and they still bring me right back to simple, cozy kitchens filled with steam and warmth.

This soup is something different than potato leek soup. It’s lighter, silkier, and layered with that subtle oniony sweetness that leeks are known for. Add fennel, and suddenly you have this aromatic, slightly anise depth that makes your taste buds work in a perfect spring recipe! This is one of those fennel recipes and leek recipes that prove they’re more than just the fancy relatives of onions and garlic.

It’s comforting without being heavy, creamy without relying on dairy, and perfect for a fresh spring recipe when you want something soothing but not too rich. If you’ve ever wondered how to cook leeks or how to use leeks in a way that feels exciting again, this homemade leek soup recipe is your answer. Perfect for a gluten-free diet, dairy-free, keto-friendly, vegan, Paleo, and Whole30-compliant.

Why You’ll Love This Recipe

A delicious way to explore fennel recipes and leek recipes in one dish
Something different than potato leek soup, with more depth and brightness
Very European in flavor, simple, elegant, and ingredient-driven
Easy to make, but tastes like it simmered all day
Perfect for meal prep or a cozy dinner

A black bowl filled with creamy green soup, garnished with fresh dill, chopped herbs, lemon zest, and a drizzle of olive oil. A gold spoon rests inside the bowl. Another bowl is partially visible in the background.

Ingredients for Fennel Leek Soup

Fennel: brings a gentle sweetness and aromatic flavor. When it softens in the pot, it becomes mellow, almost buttery, and adds complexity to the fennel soup recipe.
Leek: is where the magic begins. Subtly onion in flavor, softer than onions, and incredibly silky when cooked down. I always say I love leeks because they create a delicate base that doesn’t overpower. If you’re learning how to cook leeks, this is a beautiful place to start.
Celery: adds a fresh, green backbone to the soup. It balances the sweetness of the fennel and leek, keeping the flavor clean and the soup light.
Onion and garlic: deepens the base. Even though leeks are part of the same family, adding an onion builds layers and makes the soup feel fuller.
Bone broth or vegetable broth: gives the soup its body. I love using bone broth for richness, but a good vegetable broth keeps it light and plant-forward.
Thyme: brings a gentle herbal note that makes the soup feel very European. It ties everything together.
Coconut milk: helps create a creamy texture. It blends beautifully with fennel and leek, making the soup smooth and luxurious. You can also skip it if you want. Blending the vegetables wil make it creamy enough.
Lemon juice: is the finishing touch to balance the flavor. Just a splash brightens everything and lifts the flavors so the soup doesn’t feel flat.

This website may contain affiliate links, which means I may earn a small commission at no extra cost to you if you purchase through these links. As an affiliate, I only recommend products or services I genuinely use and love. Check the affiliate disclosure here.

Did you know?

Leeks have a much gentler flavor than onions because they contain fewer of the sharp sulfur compounds that give onions their bite.When raw, they’re mildly onion-like but softer and slightly sweet. Once cooked, especially when sautéed slowly, they turn almost buttery and creamy in flavor.

How to Make Fennel Leek Soup

Slice leeks lengthwise and rinse thoroughly to remove any hidden grit. Then chop them into soft ribbons.
In a large pot or Dutch oven, add olive oil and heat it.
Add the chopped leek, onion, thyme, and celery, and sauté until soft and fragrant.
Add the chopped fennel and cook until it begins to soften and release its aroma. You’ll notice that slightly sweet, almost licorice-like scent, that’s your cue you’re on the right track.
Pour in your broth and let everything simmer until the vegetables are tender and the flavors have mingled beautifully for about 20minutes.
When the soup is done, add lemon juice, salt, black pepper, and spinach, and cook it for 2 minutes until spinach wilts.
Add coconut milk and blend the soup until silky smooth. This is where it transforms into that creamy, comforting bowl we’re after.
Taste and adjust.

Ingredient Substitutions

Celery: Swap with zucchini or yellow squash for a softer, slightly sweeter base
Onion: Use shallots for a milder, more refined flavor
Thyme: Substitute with tarragon for a slightly more pronounced herbal note
Coconut milk: You can use cashew cream, heavy cream, or our cream if dairy works for you
Lemon juice: A splash of apple cider vinegar can brighten the soup in a similar way

Want to save this recipe?

Just enter your email and get it sent to your inbox! Plus you’ll get new recipes from us every week!

A bowl of creamy green soup garnished with fresh dill, chopped herbs, chili flakes, lemon zest, and a drizzle of olive oil, with a gold spoon resting inside the bowl.

How To Cook Leeks

If leeks feel a little mysterious, don’t worry, once you get your hands on them, they’re incredibly easy to work with and bring that soft, subtly oniony in flavor magic to your cooking.

What part of a leek do you use for soup? You’ll want the white and light green parts. That’s where all the tender, silky texture lives, the part that melts into a beautiful base for a homemade leek soup recipe.
Can I use the green part of leeks in soup? The darker green tops are more fibrous and a bit bitter. They’re technically edible, but for a creamy, light, and delicious soup, stick to the softer lower portion. Save the tops for broth if you don’t want to waste them.
How to cut leeks for soup: Trim off the root end. Then cut away the dark green tops where the color changes. What you’ll have left is a smooth, pale stalk. Slice it into even rounds, about ¼ inch thick, so everything cooks evenly and softens at the same pace.
How to wash leeks? Leeks love to hide a little dirt between their layers; it’s just part of their charm. The easiest way to clean them is after slicing. Drop the pieces into a bowl of water and give them a gentle swish. The grit sinks to the bottom while the leeks float. Lift them out, drain.

Chef Angie’s Tips

Always clean your leeks thoroughly; gritty soup is not the vibe
Don’t rush the sauté step; this is where the flavor develops
Blend the soup longer than you think for that ultra-silky texture
Let the soup sit for a bit before serving; the flavors deepen beautifully

Ways To Serve

Serve with gluten-free sourdough or a gluten-free sandwich bread
With a lemon herb-infused butter and fresh herbs for a restaurant-style finish
Pair it with plantain bread,
Top with toasted seeds for a bit of crunch
Add a simple spring salad, forest pine tips salad, or a fennel salad on the side for a complete, light meal
With artesian gluten-free bread, high-protein seed bread, or buttermilk scones

Storage

Store in an airtight container in the fridge for up to 5 days. Reheat gently on the stove, adding a splash of broth if it thickens.

A bowl of creamy green soup garnished with fresh dill, lemon zest, and herbs, with a gold spoon resting inside. Two more gold spoons and sprigs of dill are placed nearby on a light marble surface.

FAQ

Can I make this soup vegan?

Yes, just use vegetable broth and keep the coconut milk, it’s naturally creamy and delicious.

What does fennel taste like in soup?

It becomes mild, slightly sweet, and aromatic, not overpowering at all.

If this fennel leek soup made your kitchen smell like a cozy European escape, share it with someone who needs a little comfort in a bowl. Save it, pin it, and come back to it the next time you’re wondering how to use leeks in a way that feels fresh, nourishing, and just a little bit magical.

Fennel Leek Soup

This fennel leek soup is creamy, light, and comforting with a very European feel. A delicious spring recipe that shows how to use leeks and fennel in a simple, nourishing way.

No ratings yet

Print Recipe Pin Recipe

Prep Time 10

Cook Time 20

Total Time 30

Course Soup

Cuisine European, Healthy

Servings

Calories 229 kcal

Equipment

Ingredients

3 Leeks
4 bulbs Fennel
1 Onion
2 tbsp Garlic minced
3 tbsp Thyme chopped
2 cups Spinach
2 tbsp Olive oil
64 oz Vegetable broth or bone broth
1/4 cup Lemon juice
1 can Coconut milk full fat
1/2 tsp Salt
1/4 tsp Black pepper
1/4 tsp Red pepper flakes optional

Instructions

Slice leeks lengthwise and rinse thoroughly to remove any hidden grit. Then chop them into soft ribbons.
2. In a large pot or Dutch oven, add olive oil and heat it.
3. Add the chopped leek, onion, thyme, and celery, and sauté until soft and fragrant.
4. Add the chopped fennel and cook until it begins to soften and release its aroma. You’ll notice that slightly sweet, almost licorice-like scent, that’s your cue you’re on the right track.
5. Pour in your broth and let everything simmer until the vegetables are tender and the flavors have mingled beautifully for about 20minutes.
6. When the soup is done, add lemon juice, salt, black pepper, and spinach, and cook it for 2 minutes until spinach wilts.
7. Add coconut milk and blend the soup until silky smooth. This is where it transforms into that creamy, comforting bowl we’re after.
8. Taste and adjust.

Nutrition

Calories: 229kcalCarbohydrates: 17gProtein: 3gFat: 19gSaturated Fat: 13gPolyunsaturated Fat: 1gMonounsaturated Fat: 4gSodium: 1432mgPotassium: 351mgFiber: 2gSugar: 5gVitamin A: 2517IUVitamin C: 21mgCalcium: 73mgIron: 4mg

Keyword Fennel Leek Soup

Tried this recipe?Let us know how it was!

Love My Content? Buy Me a Coffee!

Creating these resources for you is my passion, and I love hearing how they’ve helped you on your health journey. If you appreciate my content and want to support my work, you can buy me a coffee to help fuel more tips, recipes, and inspiration. Every little bit means the world to me!

Fennel Leek Soup