Böckling med Pepparrot och Potatis (Swedish Smoked Baltic Herring with Horseradish)

Böckling — whole Baltic herring smoked over alder wood — is one of Sweden's most treasured coastal delicacies, particularly beloved on the Baltic Sea island of Gotland and along the Norrland coast. This one-pot dish simmers böckling in cream and aromatics with waxy potatoes, delivering a smoky, rich, deeply Nordic one-pot meal that captures the essence of Swedish maritime life.

Serves: 4

Ingredients

• 800g (1¾ lb) böckling (smoked Baltic herring) — or substitute smoked mackerel fillets
• 800g (1¾ lb) waxy potatoes (e.g., Roseval or Charlotte), sliced 5mm thick
• 1 large onion, thinly sliced
• 300ml (1¼ cups) double cream
• 150ml (⅔ cup) fish stock or vegetable broth
• 2 bay leaves
• 5 whole white peppercorns
• 1 tsp Dijon mustard
• Salt and white pepper to taste

To serve:

• 3 tbsp freshly grated horseradish (or 2 tbsp prepared horseradish)
• 100ml (⅓ cup) sour cream
• Handful fresh chives, snipped
• Rye crispbread

Instructions

1. If using whole böckling, remove the head and bones, keeping the fillets intact. Smoked mackerel fillets can be used as-is.
2. In a wide, heavy pot or braiser, layer half the sliced potatoes on the bottom. Season with salt and white pepper. Layer half the onion slices on top.
3. Arrange the böckling fillets in a single layer. Top with remaining onion and potatoes. Season again.
4. Whisk together cream, fish stock, mustard, bay leaves, and white peppercorns. Pour over the layered dish.
5. Bring to a gentle simmer over medium heat, then reduce heat to low. Cover and cook 25-30 minutes until the potatoes are completely tender and have absorbed the smoky cream.
6. Meanwhile, stir grated horseradish into the sour cream with a pinch of salt.
7. Remove bay leaves and white peppercorns. Serve directly from the pot, topped with chives, with horseradish cream and rye crispbread alongside.

Cook's Notes: Böckling is available from Scandinavian delicatessens, online Nordic food retailers, and well-stocked fishmongers. The smoking gives the herring a much milder, sweeter flavor than cold-smoked salmon — it is closer to smoked mackerel. Freshly grated horseradish is vastly superior to jarred; use a microplane for finest results.