5best2buy
The Recipe · No.99 · Potato Leek Soup

Potato Leek Soup, and where to source it

Potato Leek Soup — 5best2buy.com 5BEST2BUY.COM Potato Leek Soup French 5best2buy.com

Starchy potatoes give this soup its body without any cream, so the variety matters. The move that keeps it clean-tasting: sweat the leeks gently in butter without letting them brown, so the soup stays pale, sweet, and delicate.

By Vince Gonzalez · Published July 2026 · Sourcing verified 5 Jul 2026

Prep15 min
Cook40 min
Makes6 servings
CuisineFrench
Cost$$
Gluten-free
Contains  dairy
The Ingredients — and where to get them
Cook for 6 servings
Russet potatoes
Starchy potatoes break down and thicken the soup as they cook.
1.5 lb, peeled and cubed
Butter
The fat that carries the leeks; a good cultured butter adds a faint tang.
4 tbsp
Chicken or vegetable broth
The simmering liquid; a clean broth keeps the flavor bright.
5 cups
Leeks
White and pale green parts only; slice and rinse them well, they hide grit.
3 large, sliced
Local / market
The Rundown
Greedometer ●●●● Squeaky clean
About as virtuous as dinner gets.
EffortSome doing
Cook it with
Instant PotSlow cookerOne-pot
The Method
  1. Sweat the leeksMelt the butter over medium-low and cook the sliced leeks 10 minutes until soft and floppy, without letting them take on any color.
  2. Simmer the potatoesAdd the cubed potatoes and the broth. Bring to a simmer and cook 20 minutes until the potatoes fall apart when pressed.
  3. Blend smoothBlend the soup until completely silky. For the cleanest texture, pass it through a sieve, though it's fine without.
  4. SeasonSalt and white pepper to taste. It should taste sweet from the leeks; add a knob of cold butter at the end for gloss.
The Toolkit

Blender · Heavy pot

Straight Answers
Can you make Potato Leek Soup in an air fryer? — Yes, with an insert

Not on its own — an air fryer can’t hold a pool of liquid. You can simmer it in an oven-safe dish or a silicone insert made to fit the basket, but the broth won’t reduce or brown the way it does on the stove, and that insert comes out scorching, so use oven mitts. For real depth, a pot on the stove wins.

Can you freeze Potato Leek Soup? — Yes

Yes — it freezes well. Cool it fully, portion into airtight containers, and it keeps a few months; thaw in the fridge and reheat gently.

Can you make Potato Leek Soup ahead of time? — Yes

Yes — it holds well and often tastes better the next day. Make it ahead and reheat gently before serving.

Is Potato Leek Soup gluten-free? — Yes

Yes — nothing in this recipe as written contains gluten. As always, glance at the labels on any packaged items (broth, sauces, chocolate), since brands vary.

Is Potato Leek Soup vegan? — No

No — it contains meat, so it isn’t vegetarian or vegan.

Community Notes

Cooked it? Changed something that worked? Leave a note for the next person — first-name basis, no account.

Loading notes…

Notes are public and posted as written. Be kind, no links. Spam and abuse get removed.

More French recipes
RatatouilleCroque MonsieurCrepesHouse VinaigretteCrème BrûléeÉclairs
All French recipes →  ·  Browse all 1433 →
One list, with a link to where to buy each one.

Some ingredient and tool links are affiliate links — if you buy through one, 5best2buy may earn a small commission at no extra cost to you. It never costs the maker anything, and it never decides who we recommend. The list is the list.
© 2026 5best2buy.com · Recipe No.99

Open data. Every maker on this site is published as a free dataset under CC BY 4.0 — use it in anything, commercial or not, as long as you credit 5best2buy. Browse the datasets →