Light Nordic Fish Soup with Cod, Leeks and Dill

Nordic-style fish soup is known for clean, gentle flavours rather than heavy richness: tender white fish, sweet leeks, root vegetables and potatoes in a clear fish stock, often finished with herbs and a touch of dairy. In this version, cod is simmered only briefly so it stays in large, delicate flakes, while new potatoes and carrots make the bowl satisfying enough for dinner. Double cream rounds the broth without masking its freshness, and dill with lemon gives the final soup its recognisable bright, herbal lift. It is an easy, calming one-pot meal, best served hot and handled gently so the fish keeps its texture.
Cuisine style Nordic home cooking
Flavor profile Light • Creamy • Fresh dill • Lemony
Techniques Sweating leeks • Gentle simmering • Poaching fish
Key equipment Large pot
Cooking style One-pot cooking • Minimal cleanup
Time commitment Under 1 hour

Why this recipe works

  • Gentle savoury base: Softening the leek in butter before adding the stock gives the broth a sweet, rounded foundation without browning.
  • Light creaminess: A small finish of double cream smooths the broth while keeping the soup fresh rather than rich or heavy.
  • Clean finish: Lemon juice added at the end lifts the fish, potatoes and cream, preventing the soup from tasting flat.

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Timing notes

  • Serve soon after cooking: The cod is at its best when just cooked through and still in large flakes, so serve the soup shortly after the fish is added.
  • Prep the vegetables first: Have the leek, carrots and potatoes cut before starting; once the soup is simmering, the final stages move quickly.

Texture tips

  • Keep the cod tender: Use a bare simmer once the fish goes in. Strong boiling can break the cod apart and make it dry.
  • Add cream gently: Lower the heat before stirring in the cream and avoid boiling after it is added to keep the broth smooth.

Ingredient notes

  • Choose firm white fish: Cod works well because it flakes cleanly but still holds its shape when gently poached in the broth.
  • Use fresh dill if possible: Fresh dill gives the soup its clean, grassy finish; dried dill will taste flatter and should be used with restraint if substituted.
  • Add lemon to taste: Stir in the lemon gradually at the end, tasting as you go, until the broth feels bright but not sharp.

Make-ahead tips

  • Prepare the vegetables ahead: The leek, carrots and potatoes can be trimmed and cut in advance to make the final cooking quicker.
  • Reheat gently: Warm leftovers slowly over a low heat until piping hot, stirring carefully and avoiding a boil so the fish and cream stay in good condition.

Equipment you'll need

Ingredients
Instructions
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  1. Trim the leek, then slice it and rinse well to remove any grit. Peel the carrots and cut into small bite-size pieces. Scrub the new potatoes and cut into bite-size chunks so they cook evenly.
  2. Melt the butter in a large pot over a medium heat. Add the leek with a pinch of the salt and cook for 6 to 8 minutes, stirring, until softened but not browned.
  3. Stir in the carrots and potatoes, then pour in the fish stock. Bring to a gentle simmer, then cook for 12 to 15 minutes until the potatoes are just tender.
  4. Cut the cod into large chunks and slide them into the soup. Simmer very gently for 4 to 6 minutes, until the fish is opaque and flakes easily.
  5. Lower the heat and stir in the double cream; do not let it boil. Add the white pepper and the remaining salt to taste, then take the pot off the heat.
  6. Finely chop the dill and stir most of it through the soup. Squeeze in lemon juice a little at a time until the broth tastes clean and bright. Ladle into bowls and finish with the remaining dill.

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Recipe notes

Tips

  • Keep the soup at a bare simmer once the cod goes in; a rolling boil will break the fish up and can make it dry.
  • If you are serving anyone who is pregnant, elderly, or immunocompromised, make sure the fish is cooked until fully opaque and piping hot throughout.

Substitutions

  • Replace double cream with crème fraîche for a slightly tangier finish; stir it in off the heat to prevent splitting.
  • Replace fresh dill with fresh parsley for a milder, greener flavour.

Storage

  • Refrigerate up to 2 days
  • Cool, cover and refrigerate within 2 hours. Reheat gently in a saucepan over a low heat until piping hot, stirring often and avoiding boiling to keep the fish in large flakes and the cream smooth.

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Light Nordic Fish Soup with Cod, Leeks and Dill
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Recipe overview

  • Servings: 4 servings
  • Total time: 50min (20min active)
  • Difficulty: Easy
  • Cuisine: Nordic
  • Allergens:
    Fish Milk
Beginner friendly One pot Kid friendly

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