The potatoes come out of the oven with browned edges and soft centers, which gives this soup a deeper, more rounded taste than potatoes simmered straight in broth. That oven step is what first caught my attention when I made Ina Garten’s roasted potato leek soup. It turns a short list of familiar ingredients into a smooth, satisfying bowl.
I like that the potatoes roast while the leeks soften slowly on the stove. There’s no rush to brown the leeks; they should turn tender and sweet without taking on color. Once the broth and roasted potatoes meet, a brief simmer brings everything together before blending.
Heavy cream goes in at the end, after the pot comes off the boil. The finished soup is silky, with the gentle sweetness of leeks and the deeper, toasty flavor of roasted Yukon Gold potatoes in every spoonful.
Kitchen Note
Keep the immersion blender head beneath the soup’s surface before switching it on. Moving it slowly through the pot helps avoid splashes of hot soup, especially when you reach the bottom corners.
Save Ina Garten’s roasted potato leek soup for a night when you want a smooth, cream-finished bowl built from golden oven-roasted potatoes.
The Potato Roast Is Doing More Than Softening the Potatoes
Potatoes cooked in broth soften, but they don’t pick up the same browned edges that develop on a hot baking sheet. Here, the oven gives the Yukon Golds color before they go into the pot. That roasted flavor carries through the whole batch, even after the potatoes are blended smooth.
It also means the soup’s flavor isn’t relying on the leeks or cream alone. The leeks bring a mild sweetness, while the potatoes contribute a toasty, savory note. Those two parts stay distinct enough to keep the soup from tasting one-note, even with a short simmer.
Keep the roasting pan in mind when you spread the potatoes out: an even layer gives them contact with the hot metal instead of leaving them piled on top of one another. The goal is golden brown and fork-tender pieces, not just cooked-through potatoes. Once they’re blended with broth, that color won’t show, but the roasted taste still does.
Why Yukon Golds and Leeks Give This Soup Its Silky, Sweet Base
- Yukon Gold potatoes — Their naturally creamy texture blends into a smooth soup without needing a thickener. Choose firm potatoes without soft spots; a russet is a workable substitute prepared the same way, though it makes the soup starchier and heavier.
- Leeks — The white and light green portions soften into a mellow, lightly sweet base. Look for firm leeks with crisp leaves. If you can’t find them, use an equal volume of thinly sliced yellow onion; the soup will taste more onion-forward and less delicate.
- Low-sodium chicken broth — A mild, savory broth supports the potato and leek flavors without pushing the salt too high. Boxed broth works well, and a strong, heavily seasoned stock can make the finished soup taste saltier and less balanced.
- Heavy cream — Cream gives the blended soup its lush finish and softens the roasted flavors. Half-and-half can stand in at the same volume, but the result will be lighter and less rich.
- Olive oil and unsalted butter — Olive oil coats the potatoes for roasting, while butter gives the leeks a rounded, gentle base. An everyday olive oil is fine here; for the leeks, olive oil can replace the butter at the same volume, with a slightly less buttery finish.
From Golden Potatoes to a Smooth, Creamy Pot
Roast Until the Edges Turn Golden
Heat the oven to 425°F. Toss the peeled, 1-inch potato cubes on an 18×13-inch rimmed baking sheet with the olive oil, 1 teaspoon of the kosher salt, and the black pepper, then spread them in an even layer. Roast for 35 to 45 minutes, turning once halfway through. They’re ready when they’re golden brown and a fork slides through easily.
Soften the Leeks Without Browning Them
Melt the butter in a 6-quart Dutch oven or heavy pot over medium-low heat, then add the cleaned, thinly sliced leeks and the remaining 1/2 teaspoon of salt. Stir often as they cook for 8 to 10 minutes. They should become soft and tender, not brown; if you see color forming, lower the heat so the leeks stay sweet and mild.
Bring the Broth and Potatoes Together
Add the chicken broth and roasted potatoes to the leeks, then bring the pot to a gentle simmer. Let it cook for 5 minutes so the ingredients come together before blending. A gentle simmer means small bubbles breaking the surface now and then, not a rolling boil.
Blend Smooth, Then Finish with Cream
Use an immersion blender to blend the soup until smooth. Stir in the heavy cream only after the potatoes and broth are blended, then warm the soup over low heat for 2 to 3 minutes. Keep it below a boil; once the cream is mixed in, gentle heat is all it needs.
Two Useful Changes Without Losing the Soup’s Character
Make a Half Batch for a Smaller Table
Halve each ingredient, including both portions of the divided salt, and use the same roasting temperature and pan so the potatoes still have room to brown. Start checking them at the beginning of the 35-to-45-minute roasting window. The smaller pot of soup will still need its gentle simmer and low-heat finish, but keep an eye on it as it warms.
Make It Vegan with Coconut Milk
Use vegetable broth in place of the chicken broth, olive oil instead of butter at the same volume, and unsweetened full-fat canned coconut milk in place of the heavy cream at the same volume. The soup stays creamy, but the coconut adds a gentle aroma and changes the classic leek-and-potato flavor.
Storage and Reheating
- Refrigerator: Keep the soup in an airtight container for 3 to 4 days. It may thicken as it chills.
- Freezer: Freeze cooled soup in airtight portions for up to 2 months. The cream can separate slightly after thawing, but stirring as it warms usually brings it back together.
- Reheating: Warm it gently in a saucepan over low heat, stirring often. Avoid a boil, which can make a cream-based soup separate.
The Potato-Leek Soup Questions That Come Up at the Stove
Ina Garten Roasted Potato Leek Soup Recipe
Ingredients
Equipment
Method
- Preheat the oven to 425°F.
- Toss the potatoes on an 18x13-inch rimmed baking sheet with the olive oil, 1 teaspoon of the salt, and the pepper.
- Spread the potatoes in an even layer.
- Roast the potatoes for 35 to 45 minutes, turning them once halfway through, until golden brown and fork-tender.
- Melt the butter in a 6-quart Dutch oven or heavy pot over medium-low heat.
- Add the leeks and remaining 1/2 teaspoon salt, and cook for 8 to 10 minutes, stirring often, until the leeks are soft but not browned.
- Add the chicken broth and roasted potatoes, and bring to a gentle simmer.
- Cook for 5 minutes.
- Blend the soup with an immersion blender until smooth.
- Stir in the heavy cream.
- Warm over low heat for 2 to 3 minutes without letting it boil.
