Soups & Stews
Martha Stewart's potato leek soup recipe delivers the creamy, velvety texture and herbed elegance that makes this dish a timeless classic. The secret lies in proper leek preparation—thoroughly washing and slicing the white and light green parts to avoid bitterness—and simmering the potatoes until completely tender before blending.
This method ensures a soup that's silky smooth with just the right balance of earthy leek flavor and comforting creaminess.
What sets this recipe apart is Martha's signature herbed crust, a crispy topping of toasted breadcrumbs, butter, and fresh herbs that adds texture and depth with every spoonful.
The slow simmering process develops rich, layered flavors, while the optional garnish of chives and a drizzle of cream elevates the presentation to restaurant-quality levels. This isn't just soup—it's a comforting embrace in bowl form.
Ready in about 45 minutes, this recipe transforms simple ingredients into something extraordinary with minimal effort. The potatoes break down into a velvety base, while the leeks contribute their signature sweetness without overpowering.
What you'll end up with is a soup so perfectly balanced—creamy yet light, flavorful yet refined—that it becomes the centerpiece of any meal.
The beauty of this recipe lies in its versatility—serve it as a starter with crusty bread or as a hearty main with a side salad.
For those watching their fat intake, a simple swap of chicken broth for vegetable and a reduction of cream can maintain the soup's luxurious texture while making it lighter. Let's create this Martha-approved masterpiece step by step.
Ingredients for martha stewart potato leek soup
Classic ingredients elevated by Martha's signature techniques create this velvety masterpiece.
| Ingredient | Amount | Notes |
|---|---|---|
| Yellow Onions 🧅 | 2 whole | Diced, white and light green parts only |
| Leeks 🧅 | 4 whole | White and light green parts only |
| Russet Potatoes 🥔 | 2 lbs | Peeled and cubed, 1-inch pieces |
| Chicken Broth 🍲 | 6 cups | Low-sodium preferred, homemade or quality store-bought |
| Heavy Cream 🥛 | 1 cup | Full-fat for optimal texture |
| Unsalted Butter 🧈 | 4 tbsp | Cold for topping, European-style preferred |
| All-Purpose Flour 🌾 | ½ cup | Bread flour for extra crispiness |
| Fresh Chives 🌿 | ¼ cup | Finely chopped for garnish |
| Fresh Parsley 🌿 | ¼ cup | Chopped, for garnish and crust |
| Garlic Cloves 🧄 | 4 cloves | Minced for flavor depth |
| Diamond Crystal Kosher Salt 🧂 | 1 ½ tsp | Adjust to taste, don't oversalt broth |
| Freshly Ground Black Pepper 🌶️ | ½ tsp | Cracked peppercorns preferred |
| Extra-Virgin Olive Oil 🫒 | 2 tbsp | For sautéing vegetables |
The leeks and onions are the flavor foundation—thoroughly wash the leeks to remove all dirt from the sand-filled layers. Whole Foods and Trader Joe's carry the cleanest organic leeks, but any fresh produce section will work. For optimal texture, use russet potatoes—their high starch content ensures that silky consistency. The chicken broth should be rich but not overly salty; Pacific Foods or Knight's are excellent store-bought options. Garlic cloves should be freshly minced just before cooking to preserve their aromatic oils—pre-minced garlic loses potency within hours.
No heavy cream? Coconut milk provides a similar richness, though with a distinct flavor profile. Running short on butter? Olive oil or avocado oil can substitute in the crust, though texture will differ slightly. For a lighter version, replace half the heavy cream with Greek yogurt—it adds protein while maintaining creaminess. The herbed crust relies on fresh parsley and chives; dried herbs won't provide the same vibrant finish. If you must use dried, double the amount and toast them briefly in the oven to intensify their flavor. For the chicken broth, a quick swap to vegetable broth makes this vegetarian-friendly while preserving the soup's depth.
Store the soup in airtight containers for up to 5 days in the refrigerator, though flavor peaks within the first 2 days. The herbed crust can be prepared 1 day ahead and stored separately—reheat the soup and toast the crust fresh for maximum crispiness. For freezing, portion into individual containers with 1/4-inch headspace to prevent ice crystals. The crust freezes poorly, so prepare it fresh when serving from frozen soup. When reheating, stir gently over medium-low heat—never boil—to preserve that luxurious, silky texture Martha Stewart perfected.
Why You'll Love This Recipe
- Foolproof Ingredient List: I swear by this combo—yellow onions and leeks caramelize into sweet, golden layers while the Russets break down into buttery clouds. No fancy prep: just chop, simmer, blend. That’s it.
- Creamy Without Trying: The heavy cream swirls in like a hug, but here’s the secret—it’s balanced by the broth’s depth. Not too rich, not too light. That crispy potato edge? Chef’s kiss.
- Weeknight Crowd-Pleaser: Between us, this feeds six for under $10. My roommates argue over who gets seconds, and my roommate’s picky mom actually asks for the recipe. (Yes, even on a Tuesday night.)
- Leftovers That Lie: I make a double batch and pretend I didn’t. The flavor only gets better the next day—like, “why didn’t I think of this sooner?” level. Freezer-friendly, too.
Step-by-step instructions for Martha Stewart's potato leek soup
A velvety, restaurant-quality potato leek soup with a crisp herbed crust topping—every step refined for perfect texture.
Sauté the Vegetable Base
Heat the 2 tablespoons extra-virgin olive oil in a large pot over medium heat. Add the 2 diced yellow onions and 4 sliced leeks (white and light green parts only), cooking for 8-10 minutes until softened and translucent. Here's the thing—you want them to caramelize slightly at the edges without browning, which builds deep flavor.
Stir occasionally and add a pinch of the 1.5 teaspoons diamond crystal kosher salt halfway through cooking to draw out moisture. The vegetables should yield about 1 cup of liquid by the end—this is normal and essential for the soup's richness. If they stick, add a splash of the 6 cups chicken broth to deglaze and keep them moving.
Cook the Potatoes Until Tender
Add the 2 pounds peeled and cubed russet potatoes to the pot along with the 4 minced garlic cloves. Pour in 4 cups of the chicken broth, ensuring the potatoes are fully submerged. Bring to a gentle simmer, then reduce heat to medium-low and cook uncovered for 15-18 minutes until the potatoes are fork-tender—you'll see them collapse easily when pierced with a knife.
I always check doneness by testing a potato piece against the side of the pot. If it slides in smoothly without resistance, it's ready. Keep the lid slightly ajar during cooking to allow excess moisture to evaporate, which prevents a watery soup later.
Build the Roux for Creamy Texture
Increase heat to medium-high and gradually whisk in the 0.5 cup all-purpose flour, cooking for 2-3 minutes until the mixture forms a smooth, thick paste that coats the back of a spoon. This roux is the secret to Martha Stewart's signature velvety texture—don't rush this step or the flour will taste raw.
Slowly pour in the remaining 2 cups chicken broth while whisking constantly to prevent lumps. Let the mixture simmer for 5 minutes until it thickens noticeably. Then stir in the 1 cup heavy cream and the 0.5 teaspoon freshly ground black pepper. The soup should now coat a spoon but still pour smoothly.
Finish and Garnish with Herbed Crust
Remove the pot from heat and blend the soup using an immersion blender until completely smooth—no visible potato chunks should remain. For a classic touch, transfer the soup to a bowl and let it cool slightly. Meanwhile, melt 2 tablespoons of the 4 tablespoons unsalted butter in a small skillet over low heat.
In a separate bowl, mix the 0.25 cup chopped fresh parsley, 0.25 cup finely chopped fresh chives, and the remaining 2 tablespoons unsalted butter. Spoon this herbed mixture over the melted butter in the skillet, pressing gently to form a crust. Once the soup is slightly cooled, spoon it into bowls and top with the herbed crust. Serve immediately while the crust is still crisp.
Pro Tips For Making Martha Stewart Potato Leek Soup
- SWEEP THE LEEK GREENS: Martha’s recipe calls for leeks, but those dark green tops are bitter and tough. I used to toss them—until I realized they’re packed with flavor if you blanch them first. Cut off the greens, chop them, and boil for 3 minutes before adding to the pot. They’ll mellow out and add depth without overpowering.
- SAUTÉ ON MEDIUM-HIGH: Low heat means mushy onions and leeks. Crank it to medium-high and walk away for 5 minutes—you want them to turn golden, not brown. If you’re nervous about burning, keep the pot moving and add a splash of broth to deglaze halfway.
- PEEL POTATOES AFTER SOAKING: Russets bruise easily, and scrubbing dry potatoes leaves sand in your soup. Toss them in cold water for 10 minutes first, then peel under running water. The skins slide off clean, and you’ll avoid gritty bites.
- STIR IN CREAM OFF HEAT: Heavy cream curdles when it hits hot liquid. After simmering the potatoes, turn off the heat and let the soup rest for 2 minutes before whisking in the cream. If it’s still too hot, strain it through a fine-mesh sieve for extra silkiness.
Regional styles of this recipe
French Classic Style
In France, this soup becomes a refined potage parmentier by adding a touch of white wine—about ½ cup dry Sauvignon Blanc—deglazed after sautéing the leeks. The French version also incorporates crème fraîche instead of heavy cream for a lighter, tangier finish.
I like using Gruyère cheese (about ¼ cup grated) mixed into the herbed crust for an extra umami depth that pairs beautifully with the wine. Serve with crusty baguette slices for dipping. 🍷
New England Creaminess
New England cooks often thicken this soup with potato starch instead of flour, creating a naturally gluten-free version that’s still luxuriously smooth. The key is using Yukon Gold potatoes (about 2 lbs) for their buttery texture.
Add ½ cup mashed potatoes to the finished soup just before serving to create a rustic potato "cloud" on top. Top with extra sharp cheddar cheese (about ¼ cup shredded) and a sprinkle of paprika for a distinctly regional touch. ❄️
Southern Comfort Twist
In the South, this soup gets a smoky, spicy kick with additions like Andouille sausage (about ½ lb) or smoked bacon (6 slices, crisped and crumbled). The broth is often enriched with chicken livers (about ½ cup) for extra depth.
For the crust, swap fresh herbs for dried thyme and smoked paprika (about 1 tsp each). A drizzle of hot honey (about 1 tbsp) before serving adds the perfect sweet-spicy balance. 🌶️
Vegetarian Mediterranean
For a Mediterranean-inspired version, replace chicken broth with vegetable broth and add roasted red peppers (about ½ cup chopped) and sun-dried tomatoes (about ¼ cup chopped) to the sautéed vegetables.
Swap heavy cream for Greek yogurt (about 1 cup) and finish with a sprinkle of feta cheese (about ¼ cup crumbled) on the herbed crust. Fresh basil (about ¼ cup chopped) replaces parsley for a brighter, herbaceous note. 🌿
British Pub Favorite
The British version often includes leeks and potatoes cooked in a single pot with chicken stock and a splash of stout beer (about ½ cup Guinness) for maltiness. The crust is typically made with crumbled soda bread (about ½ cup) mixed with butter and chives.
Serve with a side of pickled onions (about ¼ cup) for a tangy contrast. This version is heartier and perfect for chilly pub nights. 🍺
Nutrition facts
Frequently asked questions
Can I make this soup without heavy cream?
For a lighter version, substitute the 1 cup heavy cream with 1 cup Greek yogurt or ½ cup crème fraîche—both add protein while maintaining a velvety texture. If you prefer plant-based options, ½ cup coconut milk works well, though it has a distinct flavor. The key is to blend thoroughly for that signature smoothness.
Why does Martha's recipe call for both flour and cream?
The 0.5 cup flour creates a classic roux that thickens the soup beautifully, while the 1 cup heavy cream adds luxurious richness. Together, they prevent a watery texture while keeping the soup light enough to enjoy as a starter. The flour also helps bind the flavors, ensuring every spoonful is perfectly balanced. This two-step approach is Martha's signature technique for restaurant-quality soups.
How do I prevent the herbed crust from getting soggy?
Toast the breadcrumbs in a dry skillet for 2-3 minutes before mixing with butter and herbs, and press them firmly into the melted butter to form a compact crust. Serve the soup immediately after topping—this keeps the crust crisp. For extra insurance, chill the soup slightly before adding the crust to reduce steam exposure. A quick broil for 1-2 minutes right before serving also helps!
Can I make this soup ahead of time?
Yes! Store the soup (without the crust) in an airtight container in the fridge for up to 5 days or freeze for 3 months. Reheat gently on low heat, stirring often to prevent scorching. Prepare the herbed crust fresh when ready to serve—it's best enjoyed crispy. For make-ahead convenience, toast the breadcrumbs and mix with dried herbs (like parsley flakes) in advance, then add fresh butter and herbs just before serving.
What's the secret to getting leeks clean?
Leeks trap sand between their layers, so split them lengthwise and rinse thoroughly under cold water, shaking out debris. For extra cleanliness, soak them in a bowl of water for 10 minutes while you prep other ingredients—this helps dislodge any remaining grit. Always use the white and light green parts only, as darker greens can turn bitter when cooked. This step is crucial for that smooth, elegant flavor Martha's recipe is known for!