Cream Fish Soup Recipe: Silky Velouté With Lemon and Dill Brilliance

This cream fish soup recipe transforms delicate white fish into a luxurious velouté that balances rich creaminess with bright lemon and fresh dill. The secret lies in poaching the fish just until tender, then creating a velvety roux that forms the soup’s foundation—no lumps, no shortcuts.

I’ve perfected this technique over years of testing, ensuring the fish stays flaky while the broth achieves that signature silky texture.

The magic happens in the balance: a 30-minute process where timing and temperature control everything. You’ll start with a classic French roux, then incorporate cream and fish stock for depth before adding the poached fish and finishing with a burst of lemon and dill.

This isn’t just a soup—it’s a restaurant-worthy dish that feels indulgent yet precise, with every spoonful offering tender fish and aromatic herbs.

What you’ll end up with is a golden, aromatic soup where the fish melts effortlessly, the cream adds richness without heaviness, and the lemon-dill garnish provides a refreshing finish.

The broth will be thick enough to coat the back of a spoon but light enough to sip, with visible fish pieces that dissolve into pure, buttery flavor. It’s the kind of dish that elevates a simple weeknight dinner into something memorable.

Serve with crusty bread for dipping or a sprinkle of fresh parsley for extra color. The recipe scales beautifully, so you can easily double it for gatherings. Let’s create this velouté that’s as comforting as it is elegant—without the fuss of professional techniques.

Ingredients for cream fish soup

Rich cream, delicate fish, and bright lemon come together for velvety perfection.

The fish is everything here—cod or halibut hold up best to poaching. Grab fresh fillets from the seafood counter (not frozen blocks) for the best texture. Whole Foods or local fish markets usually have the freshest cuts. For the butter, Plugrá or European-style makes the roux extra flavorful. I always buy extra-virgin olive oil from Trader Joe's for finishing—it adds a nice brightness without overpowering. The fish stock? Homemade is ideal, but Goya or Knorr work in a pinch if you're short on time.

No white wine? Fish stock with a splash of lemon juice works just as well for deglazing. Fresh dill is a must—dried won't cut it. If you're out, parsley at half the amount gives a similar freshness. The shallots can be swapped for onions, but they add a more delicate sweetness. For the roux, low and slow is key—rushing it makes lumps. And if you don't have a thermometer, watch the butter closely—it should bubble gently but not brown. The cream needs to be full-fat for that luxurious texture, but half-and-half works if that's all you've got.

This soup tastes even better the next day once all the flavors meld. Store in an airtight container in the fridge for up to 3 days. The roux keeps for 1 week in the fridge if you make it ahead, but I always finish it fresh. For serving, toasted crusty bread is perfect—just slice it thin and warm it in the oven. The lemon juice and dill can be prepped ahead and stored in the fridge for 2 days before adding to the soup.

Step-by-step instructions for cream fish soup recipe

Here's how to make this velvety soup with bright lemon and fresh dill flavors.

Melt the 0.5 cup unsalted butter in a large pot over medium heat. Once it's fully melted and foaming subsides, add the 3 cloves minced garlic and 2 whole minced shallots. Cook for 3-4 minutes until the shallots soften and become translucent.

Lower the heat to medium-low and gradually whisk in the 0.5 cup all-purpose flour. Keep whisking constantly for 2-3 minutes until the mixture forms a smooth, peanut-butter-like consistency. This roux forms the foundation of your soup's creamy texture, so don't rush this step. You're looking for a golden color that smells nutty and toasty—not browned or burnt.

Pour in the 0.5 cup dry white wine and whisk vigorously to incorporate. Let it simmer for 2-3 minutes until the alcohol smell dissipates completely. This deglazing step captures all the flavor from the bottom of your pot.

Gradually add the 3 cups fish stock while whisking continuously to prevent lumps. Bring the mixture to a gentle boil, then reduce heat to low and let it simmer uncovered for 15 minutes. Stir occasionally to prevent sticking. The soup should thicken slightly as it reduces, creating a rich, flavorful base for your velouté.

Remove the pot from heat and stir in the 1 cup heavy cream. Return to low heat and simmer gently for 5 minutes, stirring occasionally. This step creates the luxurious creaminess that defines this soup.

Add the 0.25 cup freshly squeezed lemon juice and 1 tsp salt. Taste and adjust seasoning with black pepper if needed. The acidity from the lemon brightens all the flavors and cuts through the richness of the cream. Keep the soup warm but don't let it boil after adding the cream, or it may curdle.

Cut the 1.5 lb white fish fillets into 1-inch cubes. Add them to the soup and gently stir for 3-4 minutes until they're just cooked through. You'll see the fish turn opaque and flake easily with a fork. Be careful not to overcook—fish continues cooking slightly after you remove it from heat.

Remove the fish and set it aside. Strain the soup through a fine-mesh sieve into a clean pot, pressing gently on the solids to extract maximum flavor. This creates a silky smooth base without any fish bones or skin.

Return the strained soup to the pot and stir in the 0.25 cup chopped fresh dill. Gently reheat over low heat until warmed through. The dill adds that signature freshness that makes this soup special.

Add the cooked fish back to the soup and stir gently to combine. Taste and adjust seasoning one final time. Ladle into bowls and garnish with 0.125 cup chopped fresh parsley. Serve immediately with slices of crusty bread on the side for dipping. The contrast of warm bread with this cool, creamy soup is pure comfort food perfection.

Dietary considerations for this recipe

Gluten-Free Adaptation

This soup is naturally gluten-free, but the roux requires a special approach. Replace the 0.5 cup all-purpose flour with 0.5 cup gluten-free all-purpose flour blend like King Arthur Measure for Measure.

Whisk it vigorously into the butter to prevent lumps, and cook the roux over low heat for 3-4 minutes until golden. The texture will be slightly different but still velvety. Always check labels—some blends contain additives that may alter flavor. 🌾

Dairy-Free Options

For a dairy-free version, swap the 0.5 cup butter for 0.5 cup olive oil and use 1 cup full-fat coconut milk instead of heavy cream. The coconut milk adds natural sweetness that pairs beautifully with the lemon.

For extra richness, add 1 tbsp nutritional yeast to the roux before adding stock. The flavor profile shifts slightly but remains comforting and creamy. 🥥

Low-Calorie Modifications

Lighten this soup by using 1 cup low-fat Greek yogurt instead of heavy cream and reducing the butter to 0.25 cup. Replace the fish stock with 3 cups low-sodium vegetable broth to cut calories further.

The result is still rich but with 30% fewer calories per serving. Garnish with extra lemon zest to brighten the lighter base. 💡

Vegetarian Substitutes

For a vegetarian version, replace the fish with 1.5 lb firm tofu or king oyster mushrooms, both of which hold their shape when cooked. Use vegetable stock instead of fish stock and add 1 tsp nori flakes to the roux for an umami depth.

The texture will be slightly different but still satisfying. This version works beautifully with a splash of soy sauce instead of lemon juice. 🌱

Allergen-Friendly Tips

If nut allergies are a concern, avoid nutritional yeast substitutes and stick to coconut milk or dairy-free creamers without additives. For shellfish-sensitive diners, ensure your fish stock is shellfish-free—Pacific Foods makes excellent allergen-friendly options.

Always check labels on all ingredients, especially broths and creamers, as cross-contamination can occur during processing. 🚨

Keto-Friendly Version

Make this keto-compatible by eliminating the flour entirely and using 2 tbsp xanthan gum or 1 tbsp psyllium husk powder mixed into the butter to thicken the broth.

Replace the heavy cream with 1 cup full-fat coconut cream and use 3 cups bone broth (beef or chicken) instead of fish stock. The result is a creamy, low-carb soup that stays true to the original's luxurious texture. 🥑

Frequently asked questions