Lohikeitto (Finnish Creamy Salmon Soup)

Name: Lohikeitto (Finnish Creamy Salmon Soup)
Prep time: 25 min
Cook time: 40 min
Total time: 1 h 5 min
Yield: 4 servings
Cuisine: Finnish
Ingredients: 600 g Salmon fillet; Salmon frame and head; 1.2 L Water; 500 g Potatoes; 1 Carrot; 1 Leek; 1 Onion; 30 g Butter; 250 ml Cream; Salt and white pepper; 6 Allspice berries; 2 Bay leaves; 1 large handful Fresh dill; Rye bread and butter

A Finnish salmon soup: potato and carrot simmered in stock made from the salmon frame, finished with cream, then the salmon cooked off the heat by residual warmth alone. Whole allspice and a generous handful of dill at the end are what make it Nordic — and not boiling the salmon is the whole technique.

Ingredients

4servings

Salmon fillet · skinned and pin-boned, in 3 cm cubes600 g
Salmon frame and head · for the stock — ask the fishmonger to keep it
Water · or shop-bought fish stock1.2 L
Potatoes · floury, in 2 cm cubes500 g
Carrot · in thick rounds1
Leek · white part1
Onion · diced1
Butter30 g
Cream · full-fat250 ml
Salt and white pepper · to taste
Spices (this is the Nordic part)
Allspice berries · whole; swapping in black pepper changes the dish6
Bay leaves2
To finish
Fresh dill · more than feels sensible, off the heat1 large handful
Rye bread and butter · the standard accompaniment

Steps

Make the stock: simmer the salmon frame and head in 1.2 L water with the bay leaves, allspice and onion trimmings for 20 minutes. Skim, then strain. Skip this if you're using shop-bought fish stock.
⏲ 25 min
Melt the butter in a pot and sweat the diced onion and leek for 5 minutes without letting them colour.
⏲ 5 min
Add the potato, carrot, strained stock, bay and allspice and simmer 15 minutes. You want the potato edges just starting to break down — that's what gives the soup body, with no flour involved.
⏲ 15 min
Pour in the cream and bring it to just below a simmer. Season with salt and white pepper. **From here it must never boil** — the cream will split.
⏲ 5 min
Turn the heat off completely. Add the salmon cubes, put the lid on, and let the residual heat cook them for 4–5 minutes, until just opaque. **This one step is where the soup is won or lost** — boiled, the salmon goes dry and falls apart.
⏲ 5 min
Stir in the chopped dill, generously. Boiled dill loses everything it has, so it goes in only after the heat is off.
⏲ 2 min
Ladle into bowls with more dill on top. Serve with buttered rye bread.

Tips & Variations

Variations

Trout instead of salmon: Finns often use rainbow trout (kirjolohi). Slightly softer flesh and cheaper.
With smoked salmon: Replace half the fresh salmon with hot-smoked, and the smoke carries through the broth — very good in winter. Add the smoked half at the end, only to warm through.
Without cream: The older style uses milk alone. Much lighter, but you'll need to break down a little more potato for body.
Roux version: Restaurants sometimes thicken with a butter-flour roux. At home the potato does enough.
Dill oil: Blend dill with neutral oil and strain — a few drops at the end lift both colour and aroma sharply.

Tips

Add the salmon off the heat. Practically every failed version of this soup fails here. Residual heat for 4–5 minutes is plenty; just-opaque is exactly right.
Make stock from the salmon frame. Skip it and you have creamy potato soup with salmon in it. Buying a whole side? Take the bones home.
Don't substitute black pepper for allspice. That faint clove-and-cinnamon note is what makes this soup Nordic. Add the berries whole and fish them out at the end if you like.
Never boil after the cream goes in. The moment it bubbles it splits. Keep it to a bare shimmer.
Use floury potatoes. Their crumbling edges thicken the broth naturally; waxy ones hold their corners and leave it thin.
More dill than you think. The Finnish quantity looks excessive to most people. It's correct.
Left overnight it thickens as the potato softens further. Reheat gently — still no boiling.

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