Fast-forward a decade and this soup still shows up on my table at least once a month. It’s the dish I make when friends drop by unexpectedly, when the fridge looks bleak, or when I simply crave the edible equivalent of a fleece blanket. The ingredients cost less than a fancy coffee, yet the flavor is rich, smoky, and deeply savory. If you can slice a leek and simmer potatoes until tender, you can master this recipe—and I’m going to walk you through every spoon-swirling detail.

Why This Recipe Works

Pantry Staples: Potatoes, leeks, broth, and a splash of milk—no specialty shopping required.
Smoky Depth: Rendering bacon fat builds an instant flavor base that tastes slow-simmered.
One-Pot Wonder: Minimal dishes mean more couch time and fewer sink-full-of-plates regrets.
Silky Without Cream: A quick blender whirl plus a touch of flour-thickened milk keeps it light on cost and calories.
Freezer-Friendly: Make a double batch; leftovers reheat like a dream for busy weeknights.
Customizable: Swap dairy, skip the bacon, or add veggies—detailed variations below.

Ingredients You'll Need

Potatoes are the soul of this soup, and the good news is the cheap ones work best. Look for russets or any starchy variety; their high starch content breaks down beautifully, naturally thickening the broth. Avoid waxy potatoes like red or new—they’ll hold their shape but won’t give you that velvety texture. If your potatoes are sprouting, simply trim the eyes; soft spots can be gouged out with a paring knife.

Leeks appear fancy, yet they’re usually the least expensive allium in the produce aisle. Choose stalks with bright green tops and firm white bases. The darker green ends are too fibrous for soup, so slice them off and freeze for homemade stock. Submerge sliced leeks in a bowl of cold water and swish to release hidden grit—nobody wants sandy spoonfuls.

Bacon adds smoky depth, but you only need three strips for eight cups of soup. Buy a value pack, freeze what you don’t use, and chop it while partially frozen for cleaner slices. Turkey bacon or even smoked paprika plus olive oil keeps the recipe vegetarian-friendly without sacrificing complexity.

Broth can be store-bought or water plus bouillon paste. If you’re watching sodium, opt for low-sodium broth and season to taste at the end. For a purely vegetarian pot, swap chicken broth with vegetable broth and add ½ teaspoon of mushroom powder for umami.

Milk supplies creaminess without heavy cream’s price tag or calories. Whole milk is ideal, but 2 % works. Dairy-free? Substitute unsweetened oat or soy milk; both have proteins that won’t curdle when simmered gently. Avoid almond milk—it tends to separate.

Lastly, a modest pat of butter and a whisper of flour create a quick roux that prevents the milk from separating and gives the soup body. If you’re gluten-free, replace flour with 1 tablespoon of cornstarch whisked into the milk.

How to Make Budget Friendly Creamy Potato Leek Soup with Bacon

Render the bacon

Place a heavy Dutch oven or soup pot over medium heat. Slice 3 strips of bacon crosswise into ¼-inch matchsticks and add to the cold pot. Cook, stirring occasionally, until the fat has melted and the edges are crisp, 5–6 minutes. Use a slotted spoon to transfer bacon to a paper-towel-lined plate, leaving the flavorful fat behind. This step seasons the entire pot and replaces pricey olive oil.

Prep the leeks

While the bacon sizzles, trim the root and dark green tops from 2 medium leeks. Halve lengthwise, then slice into half-moons ¼-inch thick. Submerge in a bowl of cold water, agitate, and lift the leeks out, leaving grit at the bottom. Pat dry; excess water will splatter when it hits the hot fat.

Soften the aromatics

Add 1 tablespoon of butter to the bacon drippings. Once it foams, stir in the leeks plus a pinch of salt. Reduce heat to medium-low and sauté until wilted and translucent, about 7 minutes. You’re not aiming for caramelization—slow sweating releases sweetness without browning, keeping the soup pale and elegant.

Build the roux

Sprinkle 2 tablespoons of all-purpose flour over the leeks. Cook, stirring constantly, for 1 minute to remove raw flour taste. The mixture will look like wet sand. This light roux prevents milk from curdling and thickens the soup just enough to coat the back of a spoon.

Deglaze and add potatoes

Slowly whisk in 4 cups of low-sodium chicken broth, scraping the pot bottom to release any fond. Bring to a gentle boil. Meanwhile, peel and cube 2 pounds (about 4 medium) russet potatoes into ¾-inch pieces. Add to the pot, reduce heat, and simmer 15 minutes or until potatoes are fork-tender.

Blend until silky

Turn off heat. Using an immersion blender, purée the soup directly in the pot until smooth. (Alternatively, blend in batches in a countertop blender; remove the center cap and cover with a towel to allow steam to escape.) Leave a few chunks for texture if you like rustic soup.

Enrich with milk

Warm 1½ cups whole milk in the microwave for 30 seconds—this prevents curdling. Stir into the soup over low heat. Simmer gently for 3 minutes; do not boil. Season with 1 teaspoon kosher salt and ½ teaspoon freshly ground black pepper. Taste and adjust.

Serve and garnish

Ladle into warm bowls. Shower with the reserved crispy bacon, a swirl of plain yogurt, and a sprinkle of fresh chives or green-onion tops. Crusty bread for dunking is mandatory.

Expert Tips

Low-and-Slow Leeks

Cooking leeks gently over medium-low heat coaxes out natural sugars without browning, keeping the soup’s color creamy white and flavor subtly sweet.

No Immersion Blender?

Mash the potatoes with a potato masher for a chunky country-style soup, or pass half the soup through a fine sieve and return it to the pot for silkiness.

Make-Ahead Magic

Soup thickens as it sits. Thin with broth or milk when reheating, and always warm slowly to prevent the dairy from curdling.

Double Duty Bacon

Save the rendered fat in a jar; it’s liquid gold for roasting vegetables or dressing warm spinach salad later in the week.

Overnight Flavor Boost

Like many soups, this one tastes even better the next day as starches hydrate and flavors marry. Perfect for Sunday meal prep.

Color Pop

For a spring vibe, stir in a handful of frozen peas during the last 2 minutes of simmering—they’ll add sweetness and vibrant flecks of green.

Variations to Try

Vegan Velvet: Replace bacon with 2 tablespoons olive oil plus 1 teaspoon smoked paprika. Use vegetable broth and unsweetened oat milk.
Loaded Baked Potato Style: Top each bowl with shredded sharp cheddar, extra crispy bacon, and thinly sliced green onions.
Green Garden: Add 2 cups chopped spinach or kale during the last 2 minutes of simmering for an iron boost and pop of color.
Spicy Kick: Stir in ½ teaspoon cayenne pepper or a diced chipotle in adobo for a smoky heat that balances the creamy base.
Seafood Chowder Twist: Fold in 8 oz bay scallops or peeled shrimp during the last 3 minutes of cooking until opaque.
Cheese Please: Whisk in 1 cup shredded sharp cheddar off heat until melted for an ultra-decadent version kids devour.

Storage Tips

Refrigerator: Cool soup completely, transfer to airtight containers, and refrigerate up to 4 days. The flavors deepen, but the soup will thicken—thin with broth or milk when reheating.

Freezer: Portion into quart-size freezer bags, lay flat to freeze, and store up to 3 months. Thaw overnight in the fridge, then warm gently over medium-low heat, whisking to restore texture.

Make-Ahead Lunch Jars: Ladle cooled soup into 2-cup mason jars, leaving 1 inch of headspace. Refrigerate for grab-and-go lunches; reheat in microwave for 2–3 minutes, stirring halfway.

Frequently Asked Questions

Red potatoes are waxier and won’t break down enough to thicken the soup. If they’re all you have, scoop out 1 cup of cooked potatoes, mash them thoroughly, and return to the pot for extra body.

High heat causes milk proteins to seize. Always warm milk before adding, keep the soup below a gentle simmer, and avoid boiling after the dairy goes in. If separation occurs, whisk vigorously or blend again to re-emulsify.

Slice first, then wash. Submerge half-moons in a salad spinner filled with cold water, spin gently, and lift the basket to leave grit behind. Repeat if the water is sandy.

Yes. Cook bacon on the stovetop first for fond, then transfer bacon, leeks, broth, and potatoes to a slow cooker. Cook on LOW 6–7 hours or HIGH 3–4 hours. Stir in warmed milk during the last 30 minutes and blend as desired.

As written it contains flour. Substitute 1 tablespoon cornstarch whisked into the cold milk for a gluten-free version that thickens just as well.

A crusty baguette or no-knead Dutch-oven bread is classic. For a budget win, toast stale sandwich bread cubes with olive oil and garlic powder for homemade croutons that add crunch without extra cost.