Benji's Basque Soup Recipe: Smoky Bacon and Caramelized Leek Layers

This Basque soup recipe from Benji delivers the rich, smoky depth of traditional Basque Country cooking with layers of caramelized leeks and crispy bacon. The secret lies in slow-cooked cod that absorbs the aromatic broth while maintaining tender perfection—just like my abuela used to make.

What sets this apart is the balance of textures: silky fish, crispy bacon, and velvety leeks that melt into every spoonful.

The recipe honors Basque culinary traditions while adapting for modern kitchens, using simple ingredients that transform into restaurant-quality soup. You'll start with gently sautéing onions and leeks until they're golden and sweet, then building flavor through slow simmering with tomatoes, garlic, and white wine.

The cod soaks up these flavors beautifully, creating a broth that's both comforting and sophisticated.

By the time you serve this soup, you'll have a steaming bowl of Basque comfort food with crispy bacon bits floating on top and tender cod that practically dissolves in your mouth.

The aroma alone will transport you to the Basque Country, where this dish has been a staple for generations. It's the kind of meal that feels special without requiring fancy ingredients.

Perfect for chilly evenings or family gatherings, this soup scales easily for crowds while still shining as a cozy dinner for two. The technique is straightforward but yields impressive results—exactly what you want when you're craving something hearty yet elegant. Let's get started with the full recipe.

Ingredients for benji's basque soup

Simple, aromatic ingredients that transform into Basque comfort soup with crispy bacon and tender cod.

The leeks and onions are your flavor foundation—take your time caramelizing them until they're golden and sweet. Trader Joe's has great pre-sliced leeks if you're short on prep time, but fresh is always better. For the cod, look for fillets with a firm texture—Whole Foods or your local fishmonger usually have the freshest cuts. Bacon is non-negotiable here; thick-cut stays crispy while rendering flavor. If you can't find cod, haddock works too, but cod's mild flavor absorbs the broth perfectly. The fish stock? Homemade is ideal, but Pacific Foods brand is a solid store-bought alternative.

No white wine? Dry vermouth or extra fish stock with a splash of lemon juice keeps the acidity. Fresh parsley is ideal for garnish, but dried works at one-third the amount if you're in a pinch. The tomato sauce can be fresh or canned—San Marzano cans are worth the splurge for their sweetness. For extra richness, stir in a spoonful of vegetable oil at the end. The bread for croutons? Stale sourdough gets extra crispy, but any crusty bread works. If you're avoiding gluten, swap for toasted corn tortillas.

This soup tastes even better the next day—honestly, the flavors meld beautifully overnight. Store leftovers in the fridge for up to 4 days, covered tightly. For freezing, portion into containers and it keeps for 3 months. I always make a double batch—one for dinner, one for lunches. The croutons stay crispy if you toast them fresh before serving, but you can also bake them ahead and reheat in the oven for 2-3 minutes at 350°F.

Step-by-step instructions for smoky bacon and caramelized leek soup

This Basque-inspired soup builds layers of flavor—smoky bacon, sweet caramelized leeks, and tender cod.

In a large Dutch oven, cook the 6 oz bacon over medium heat until crispy and the fat has rendered—about 8-10 minutes. Remove the bacon with a slotted spoon and set aside, leaving the fat in the pot. This bacon fat is pure flavor gold.

In the same pot, add ¼ cup olive oil and reduce heat to medium-low. Add the 2 whole leeks (white and light green parts only) and 1 whole onion, sliced thin. Cook for 10-12 minutes, stirring occasionally, until the leeks are deep golden brown and tender. Here's where the magic happens—the longer you cook them, the sweeter they become.

Push the leek-onion mixture to the sides of the pot and add 4 cloves minced garlic. Cook for 30 seconds until fragrant—don’t let it brown or it’ll turn bitter. Stir in the 1 cup canned tomato sauce and cook for 2 minutes to deepen the flavors.

Pour in the 1 cup dry white wine and scrape up any browned bits from the bottom of the pot. Let it simmer for 3-4 minutes until reduced by half. This step builds the rich, slightly tangy base that ties everything together. If the wine reduces too quickly, just lower the heat slightly.

Add the 2 cups fish stock and 2 whole bay leaves, then bring to a gentle simmer. Return the crispy bacon to the pot and let it steep for 5 minutes, infusing the broth with smoky depth. Season with 1.5 tsp salt and ½ tsp black pepper. Taste and adjust—this is your flavor foundation, so don’t skimp on seasoning.

Now, add the 1.5 lb cod fillets, cut into bite-sized pieces. Simmer gently for 4-5 minutes until the fish is just cooked through—it should flake easily with a fork but not fall apart. Overcooking turns cod rubbery, so keep a close eye on it. Once done, remove the cod with a slotted spoon and set aside.

Stir the 1 tbsp lemon juice into the soup and let it simmer for 1 more minute. The acidity brightens all the rich flavors and balances the dish beautifully. Remove the bay leaves and discard them—they’ve done their job.

Return the cod to the pot and gently fold it into the soup. Ladle the soup into bowls, garnishing each serving with ¼ cup chopped parsley. Serve immediately with 4 slices stale or toasted bread on the side for dipping—it soaks up every last bit of that smoky, leek-infused broth.

Flavor customization for benji's basque soup

Spice Level Adjustments

Keep it traditional with the classic recipe, but if you crave heat, stir in ½ tsp smoked paprika with the tomato sauce or add ¼ tsp cayenne pepper at the end. For a milder version, reduce the black pepper to ¼ tsp—the smoky bacon still delivers depth without spice.

I’ve tested both, and the original balance feels just right for most palates. 🌶️

Vegetarian Swap

Replace the cod with 1 lb firm tofu or king oyster mushrooms, sliced into bite-sized pieces. Sauté the tofu in bacon fat until golden before adding to the broth.

For mushrooms, cook them separately until tender and add them back at the end. The texture won’t be identical, but the umami-rich broth shines through. 🍄

Extra Richness

For a decadent twist, stir in 2 tbsp heavy cream or 1 tbsp crème fraîche just before serving. This adds a luxurious silkiness that pairs perfectly with the crispy bacon.

If you prefer dairy-free, use ¼ cup coconut milk—it’s lighter but still creamy. I love this upgrade for chilly evenings when I want extra comfort. 🥛

Herb Variations

Swap the parsley garnish for chopped chives or tarragon for a brighter finish, or add ½ tsp dried thyme with the bay leaves for a more pronounced herbal note.

Fresh dill works beautifully too—just 1 tbsp chopped adds a fresh, slightly citrusy flavor. Each herb shifts the soup’s character subtly but noticeably. 🌿

Smoky Depth Boost

For a deeper smoky flavor, add ½ tsp liquid smoke when you return the bacon to the pot, or swap the bacon for 6 oz smoked sausage like chorizo.

If you’re using chorizo, remove it before adding the cod to avoid overpowering the broth. The smokiness becomes almost meaty, perfect for hearty appetites. 🔥

Acidity Balance

Adjust the lemon juice to taste—start with 1 tbsp but add up to 2 tbsp if your wine was particularly dry. For a tangier twist, stir in 1 tsp apple cider vinegar with the lemon juice.

This cuts through the richness and brightens the entire dish, especially if you’re using a heavier wine like Chardonnay. 🍋

Frequently asked questions