Classic Potato-Leek Soup — overview

A frugal, everyday comfort soup: tender potatoes and sweet leeks cooked in stock then blended into a silky, creamy bowl. This version is made on the stovetop, keeps texture and flavor bright, and is easy to finish with a splash of cream or olive oil for richness.

Why this recipe works

• Simple ingredients you probably have on hand.
• Stovetop method that’s forgiving and quick.
• Smooth, not gluey — use the right potato and don’t overblend.

Ingredients (serves 4)

• 3 tablespoons unsalted butter or neutral oil
• 3 medium leeks (white and light green parts only), about 2–3 cups sliced and rinsed
• 1 medium onion, finely chopped (about 1 cup)
• 1 1/4 pounds Yukon Gold potatoes, peeled and cut into 1-inch cubes
• 4 cups low-sodium chicken or vegetable stock
• 1 cup water (adjust as needed)
• 1 bay leaf
• 1 teaspoon kosher salt, plus more to taste
• 1/4 teaspoon freshly ground black pepper
• 1/2 cup heavy cream or whole milk (optional for extra richness)
• 2 tablespoons chopped fresh chives or parsley for garnish
• Crusty bread or croutons, for serving

Equipment

• Heavy-bottomed pot or Dutch oven (3–4 quart)
• Chef’s knife and cutting board
• Immersion blender or countertop blender
• Ladle and wooden spoon

Step-by-step method

1. Prepare the leeks

Trim the root end and the dark green tops from the leeks. Slice the white and light green parts thinly. Transfer to a bowl of cold water, swish to remove grit, and lift the leeks out with your hands or a slotted spoon so grit stays in the bowl. Drain well.

2. Sweat the aromatics (5–8 minutes)

Heat the butter or oil in the pot over medium heat. Add the chopped onion and a pinch of salt. Cook, stirring occasionally, until the onion is translucent, about 4–5 minutes. Add the drained leeks and cook until softened but not browned, about 3 minutes.

3. Add potatoes and stock (20–25 minutes)

Stir in the potato cubes, then pour in the stock and 1 cup water. Add the bay leaf, 1 teaspoon salt, and pepper. Bring to a simmer, reduce heat to maintain a gentle simmer, cover partially, and cook until the potatoes are very tender, about 20–25 minutes.

4. Blend to desired texture (2–5 minutes)

Remove the bay leaf. For a silky soup, use an immersion blender and purée directly in the pot until smooth. For a chunkier texture, only purée half the soup or mash some of the potatoes with a potato masher. If using a countertop blender, work in batches and be cautious with hot liquid.

5. Finish and adjust

Return soup to low heat. Stir in the cream or milk if using and warm through — do not boil once dairy is added. Taste and adjust seasoning with salt and pepper. If the soup is too thick, add up to 1 cup more water or stock to reach your preferred consistency.

Serving suggestions

• Ladle into bowls and finish with a drizzle of good olive oil or a swirl of cream.
• Sprinkle chopped chives or parsley and a grind of black pepper.
• Serve with crusty bread, buttered toast, or garlic croutons.

Make-ahead and storage

• Soup keeps in the refrigerator for 3–4 days. Reheat gently on the stovetop, adding a splash of stock if it thickens.
• Freeze for up to 2 months (without cream). Thaw overnight in the fridge and reheat, adding cream after reheating.

Tips for success

• Choose Yukon Gold potatoes for a naturally creamy texture; avoid starchy Russets if you want a silkier soup without graininess.
• Don’t brown the leeks or onions — aim for soft and sweet, not caramelized.
• If using an immersion blender, pulse and move the head around so the heat disperses and you don’t create hot spots.
• For a lighter version, omit cream and finish with a tablespoon of olive oil for richness.

Variations

• Bacon and leek: Render 3–4 slices of chopped bacon, remove most of the fat, then cook onions and leeks in remaining fat for a smoky finish. Stir crispy bacon back in before serving.
• Herb-forward: Stir in 1 tablespoon finely chopped dill or tarragon at the end for a bright lift.
• Cheesy: Stir in 1/2 cup grated Gruyère or sharp cheddar while warm for a richer, gratinéed flavor.

Nutrition estimate (per serving)

Approximate values: 280–350 kcal, depending on whether cream is used; moderate protein and fat from dairy; good source of vitamin C and potassium from potatoes and leeks.