Potato leek soup is proof that humble ingredients, treated with care, outclass fancy ones treated carelessly. Leeks and onion melted slowly in olive oil, jumbo Idaho potatoes simmered until they collapse, a head of roasted garlic for sweetness, and a hand blender to bring it all to velvet. Then the part that makes this version mine: pita croutons — toasted, oil-crisped shards that stay crunchy on top of the thick soup far longer than ordinary bread cubes.
Clean Your Leeks Like You Mean It
Leeks grow in sandy soil and hold grit deep between their layers. Trim the dark green tops and root, halve them lengthwise, and wash thoroughly under running water, fanning the layers apart. One skipped rinse and the whole pot tastes of sand — it is the single most important step in the recipe.
Only the white and pale green parts go in the pot. Save the dark tops for stock — they are too fibrous to purée smoothly but full of flavor.
Sweat, Don’t Brown
Cook the leeks and onion in olive oil over medium-low heat until completely soft and translucent — 8 to 10 unhurried minutes. Browning changes the flavor from sweet and delicate to roasty, which fights the clean potato taste. The roasted garlic, on the other hand, brings exactly the mellow caramel note you want; squeeze the cloves in whole and let them dissolve into the soup.
The Potato Question
Starchy Idaho (russet) potatoes are the right call here. They break down willingly and give the soup its plush, thick body — no cream required, though a splash at the end never hurt anyone. Waxy potatoes stay in stubborn chunks and make a thinner soup. Cut them evenly so they finish together, and simmer until a fork meets zero resistance.
Purée and the Pita Crouton Move
A hand blender right in the pot is easiest — purée until smooth, or leave a little texture if that is your style. If using a countertop blender, work in batches and vent the lid; hot soup expands.
For the croutons, cut pita into bite-size pieces, toss with olive oil and salt, and toast until deeply golden. Pita’s structure is the secret — it crisps into sturdy chips that float on the thick soup without going soggy by the second spoonful.
If soup season has you inspired, my chicken vegetable avgolemono and butternut squash bisque should be next in the rotation.
FAQ
Can I make it vegan?
It nearly is — use a vegetable bouillon cube (the recipe already calls for one) and skip any cream. The potatoes carry the body on their own.
Why does my soup taste flat?
Usually under-salting — potatoes absorb a remarkable amount of seasoning. Salt in stages and taste at the end. A squeeze of lemon or a few chives also wake it up.
Can I freeze it?
Yes, up to 3 months. Purée-based potato soups can turn slightly grainy after thawing — a quick re-blend restores the texture. Store croutons separately, always.
Recipe Card
Potato Leek Soup with Pita Croutons
Equipment
- (Help support our site!)Sauce Pot
- (Help support our site!)Hand Blender
- (Help support our site!)Wooden Spoon
- (Help support our site!)Chefs Knife
- (Help support our site!)Cutting Board
- Bowl(s)
- Ladle
Ingredients
- 1 whole Stalk of Leeks Cleaned Well, Rough Chop
- 2 whole Idaho Potato Jumbo Peeled & Cubed
- 6 clove Roasted Garlic See "How to" section
- 1 whole Spanish Onion Peeled, Diced
- 1 cube Vegetable Bouillon
- ¼ cup Roux
- 2 whole Bay Leave
- 2 cup Heavy Cream
- 2 stalk Celery Cleaned, Diced
- 1 cup White Wine Chablis Preferred
- 1 To Taste Salt & Pepper
Instructions
- Gather ingredients.
- Cut the leek length wise in half.
- Then slice in ¼ inch pieces and rinse well under cold water.
- Heat the sauce pan, add olive oil, onions, celery, leeks and garlic and sauté until translucent.
- Deglaze with white wine and cook for 2 minutes until alcohol burns off.
- Add the potato water and vegetable bouillon. Cook for 15-20 minutes till potato and vegetable soften.
- Puree all the vegetables with a hand blender until they are dissolve.
- Add the heavy cream, roux (See our How to for instructions) and continue to blend until mixture combines.
- Cook for an additional 5-8 minutes until the soup thickens to your desired consistency.
- Let the soup rest for 5 minutes before serving.
- Top with pita croutons and fresh herbs.