The leeks are sizzling gently in the pot, filling the kitchen with that sweet, buttery aroma that practically whispers “stay home tonight.” I’ll be honest — the first time I brought home a celeriac, I stared at it on the counter like it was some kind of puzzle I didn’t sign up for.

That gnarled, dusty-looking root seemed intimidating, and I almost shoved it into the back of the fridge and called it a day.

But then I peeled it, chopped it, and tossed it into a pot with some leeks, potatoes, and chestnuts. What came out was this incredibly velvety, subtly sweet, deeply comforting soup that made me wonder why I hadn’t been cooking with celeriac all along.

It’s the kind of recipe that makes a cold evening feel intentional, like the weather outside is just an excuse to eat something this cozy.

This celeriac and chestnut soup is one of those beautiful, low-effort, high-reward meals. It uses a handful of humble ingredients, comes together in about 35 minutes, and tastes like you spent all afternoon stirring a pot.

Whether you’re cooking for yourself, your family, or company, it delivers — and it’s naturally vegan if you use vegetable broth.

What Does Celeriac Taste Like?

If you’ve never cooked with celeriac before, you’re in for a treat. Celeriac — also called celery root — tastes like a cross between celery and parsley, with a mild, nutty sweetness that becomes incredibly mellow once it’s cooked.

It doesn’t have the sharp, stringy bite of regular celery stalks. Instead, it turns creamy and almost buttery when simmered or steamed, which makes it a perfect base for blended soups.

In this recipe, the celeriac plays beautifully with the earthy sweetness of the chestnuts and the mild, delicate flavor of leeks. The potato adds body and helps create that velvety texture without needing a drop of cream — though you can certainly add some if you’d like.

If you’ve had trouble getting excited about root vegetables before, this is the recipe that will change your mind.

How to Make Celeriac and Chestnut Soup

One of the things I love about this soup is that you have options. You can either steam the vegetables until they’re fork-tender and then blend them with broth and chestnuts, or you can sauté everything right in the pot and let it simmer.

Both methods work beautifully — it really just depends on whether you want to dirty a steamer basket or keep everything in one pot.

Either way, the process is the same at its core: cook the leeks, celeriac, and potatoes until soft, blend them with half of the chopped chestnuts and your broth until silky smooth, and then serve it up with the remaining chestnuts scattered on top for a little texture. The chestnuts give the soup a subtle sweetness and a richness that feels almost luxurious, even though the whole thing comes together with pantry-level effort.

I like to drizzle a little canola oil over the top and add some chopped chives for color and freshness. A few garlic croutons or a thick slice of toasted bread on the side never hurt, either.

Can I Make This Soup Creamier?

Absolutely. The soup is already naturally creamy thanks to the potato and celeriac, but if you want something a little more indulgent, go ahead and swirl in a splash of heavy cream right before serving.

For a dairy-free version, a dollop of vegan cream cheese or a pour of coconut cream works wonderfully too. Start with a tablespoon or two and adjust from there — you don’t want to lose that delicate celeriac flavor under too much richness.

An apple is another great addition if you want a hint of natural sweetness. Just dice one up and toss it in with the vegetables as they cook.

It melts right into the soup and adds this gentle, fruity warmth that plays off the chestnuts beautifully.

What to Serve with Celeriac Soup

This soup is hearty enough to be a meal on its own, but it also plays well with others. Here are some of my favorite ways to round it out:

• Crusty sourdough bread or garlic toast for dipping
• A simple green salad with a bright vinaigrette
• A grilled cheese sandwich — the pairing is unbeatable on a cold night
• If you’re planning a cozy soup spread for company, this pairs nicely alongside something like a beef barley soup with mushrooms for a little variety

Is This Recipe Vegan?

Yes — as long as you use vegetable broth, this celeriac and chestnut soup is completely vegan. The vegetables and chestnuts create such a rich, satisfying base on their own that you won’t miss the dairy at all.

That said, it’s incredibly flexible. Add a splash of cream, a pat of butter, or even a sprinkle of Parmesan if you’re not keeping it plant-based.

This is the kind of recipe that welcomes your personal touch without falling apart if you switch things up.

Tips for the Best Winter Soup

After making this recipe more times than I can count, here are a few things I’ve picked up along the way:

• Peel the celeriac generously. The outer layer can be tough and bitter, so don’t be shy about trimming it away. A sharp vegetable peeler works, but I find a paring knife gives me more control over those knobby bits.
• Don’t skip the chestnut garnish. Blending half the chestnuts into the soup gives it that silky sweetness, but scattering the rest on top adds a lovely bite. It’s the contrast that makes this soup feel special.
• Season at the end. The broth brings a lot of flavor on its own, so wait until after blending to taste and adjust with salt and pepper. A pinch of white pepper is especially nice here — it adds warmth without little dark specks floating around.
• Use good broth. Since the ingredient list is short, every element matters. A flavorful vegetable broth makes a real difference in the final taste.

How to Store and Reheat Leftovers

This soup keeps beautifully in the fridge for up to 4 days. Store it in an airtight container and reheat it gently on the stovetop over medium-low heat, adding a splash of broth or water if it’s thickened up overnight.

You can also freeze it for up to 3 months — just let it cool completely before transferring to freezer-safe containers. Thaw overnight in the fridge and reheat as usual.

If you’re always on the lookout for your next cold-weather bowl, you might also enjoy this cabbage roll soup or this creamy broccoli blue cheese soup — both are cozy, satisfying, and perfect for the season. And if you’re looking for something a little heartier with the same warming spirit, this Hungarian goulash soup is another weeknight favorite around here.