Silky potatoes layered with slow-cooked onions, Swedish ansjovis, cream, browned butter, and delicate breadcrumbs—baked until deeply golden and irresistibly creamy. This is the Swedish Cravings Signature Jansson's Frestelse, refined with careful technique while remaining completely true to the Swedish classic.
Few dishes are as deeply connected to the Swedish Christmas table as Jansson's Frestelse, or Janssons frestelse.
Made from potatoes, onions, Swedish ansjovis, cream, and breadcrumbs, it is one of Sweden's most recognizable comfort foods. Rich but never heavy, salty but balanced, and beautifully creamy, it appears on Christmas, Easter, Midsummer, and traditional smörgåsbord tables throughout the country.
At Swedish Cravings, we've kept the heart of the dish exactly where it belongs: potatoes, sweet onions, cream, and genuine Swedish ansjovis with their unmistakable lightly spiced flavor.
Our Signature version focuses on the details that make the finished casserole exceptional—slowly caramelized onions, properly cut potatoes, carefully reduced cream, ansjovis liquid added with restraint, browned butter in the breadcrumb topping, and a slow bake that allows every layer to become tender without collapsing into mashed potato.
The result is creamy, deeply savory, gently sweet, golden on top, and unmistakably Swedish.
The Story Behind Jansson's Frestelse
The exact origin of Jansson's Frestelse is uncertain, but the dish became widely known in Sweden during the twentieth century and has since become one of the country's most beloved traditional casseroles.
Its name translates to "Jansson's Temptation", although exactly which Jansson first inspired the name remains a matter of debate.
What is not debated is the recipe's place in Swedish food culture.
At Christmas, the dish sits comfortably beside meatballs, ham, herring, sausages, and crispbread. During Easter and Midsummer, it reappears alongside seafood, eggs, and cold buffet dishes.
It is particularly famous for its unique use of Swedish ansjovis, which is not the same thing as Mediterranean anchovies.
Swedish Ansjovis Is Not Anchovy
This distinction is essential.
Swedish ansjovis is usually made from small sprats preserved in a mildly sweet and spiced brine with flavors such as cinnamon, sandalwood, and other warm spices. The flavor is gentler, sweeter, and more aromatic than Mediterranean anchovies packed in salt or oil.
Using ordinary anchovies will produce a very different result. They are saltier, more intensely fishy, and lack the characteristic sweet-spiced brine that defines Jansson's Frestelse.
For the authentic Swedish dish, genuine Swedish ansjovis should always be used when possible.
The Swedish Cravings Signature
Our version keeps the classic ingredients while refining the cooking method.
We use:
- Floury potatoes cut into uniform matchsticks.
- Yellow onions cooked slowly until deeply soft and naturally sweet.
- Genuine Swedish ansjovis with a portion of its brine.
- Heavy cream balanced with a small amount of whole milk.
- Freshly cracked white pepper and the faintest touch of nutmeg.
- Browned butter breadcrumbs for a richer and more aromatic golden crust.
- Layering the ingredients instead of mixing them, allowing the potatoes to retain definition.
- A slow bake followed by a short high-temperature finish for crisp edges.
- Resting the finished casserole before serving so the cream thickens naturally.
Every refinement supports the original.
Nothing changes the dish's classic Swedish identity.
Ingredients
Serves 6–8 as part of a buffet
Main Casserole
- 1.2 kg floury potatoes, peeled and cut into matchsticks
- 3 large yellow onions, thinly sliced
- 250 g Swedish ansjovis, drained, brine reserved
- 450 ml heavy whipping cream
- 150 ml whole milk
- 50 g unsalted butter
- ½ tsp white pepper
- Tiny pinch freshly grated nutmeg
- 4 tbsp reserved ansjovis brine, plus extra only when needed
Browned Butter Breadcrumbs
- 125 g unsalted butter
- 100 g fine dry breadcrumbs
- Small pinch of fine sea salt
For Serving
- Fresh flat-leaf parsley, finely chopped
- Freshly cracked white pepper
Step 1 – Prepare the Onions
Melt half the butter in a wide frying pan over medium-low heat.
Add the thinly sliced onions and a very small pinch of salt.
Cook slowly for 20–25 minutes, stirring regularly, until the onions become extremely soft and lightly golden.
They should not become dark brown or crisp.
Their sweetness is important because it balances the salty ansjovis and rich cream.
Remove from the heat and set aside.
Step 2 – Prepare the Potatoes
Peel the potatoes and cut them into matchsticks approximately 5 mm thick.
Try to keep the pieces relatively uniform so they cook evenly.
Do not rinse the cut potatoes.
The surface starch helps thicken the cream and create the characteristic silky texture.
Keep them covered with a clean kitchen towel while assembling.
Step 3 – Prepare the Ansjovis
Drain the ansjovis carefully and reserve the brine.
Cut the fillets into smaller pieces if they are particularly long.
Do not rinse them.
The flavored brine is essential to the dish.
Step 4 – Prepare the Cream Mixture
Combine the cream, milk, white pepper, and nutmeg in a jug.
Add 4 tablespoons of the reserved ansjovis brine.
Whisk gently.
Taste before adding more brine.
The mixture should taste savory and gently spiced rather than aggressively salty.
Step 5 – Assemble the Casserole
Preheat the oven to:
175°C / 350°F conventional heat
or
160°C / 320°F fan-assisted.
Butter a large ovenproof casserole dish.
Arrange one-third of the potatoes across the base.
Spread half the cooked onions evenly over the potatoes.
Scatter half the ansjovis over the onions.
Repeat with another third of potatoes.
Add the remaining onions and ansjovis.
Finish with the final potato layer.
Pour the cream mixture evenly over everything.
Dot the remaining butter across the top.
Step 6 – Prepare the Browned Butter Breadcrumbs
Melt the butter in a light-colored saucepan over medium heat.
Continue cooking until the milk solids become golden and the butter smells deeply nutty.
Remove from the heat immediately.
Add the breadcrumbs and a small pinch of salt.
Stir until every crumb is coated.
Scatter the buttery breadcrumbs evenly across the potatoes.
Step 7 – Bake Slowly
Bake in the middle of the oven for approximately 60–75 minutes.
The casserole is ready when:
- The top is deeply golden.
- The cream bubbles around the edges.
- A thin knife slides easily through the potatoes.
- The edges are beginning to crisp.
If the top browns too quickly, cover loosely with foil and continue baking.
Step 8 – Finish at High Heat
Increase the oven temperature to:
220°C / 425°F conventional heat
or
200°C / 390°F fan-assisted.
Bake for another 5–8 minutes until the breadcrumbs become deeply golden and crisp.
Watch carefully to prevent burning.
Remove from the oven.
Step 9 – Rest Before Serving
Allow the casserole to rest uncovered for at least 15 minutes.
During this time, the cream will thicken and settle around the potatoes.
The flavours also become more balanced.
Finish with chopped parsley and freshly cracked white pepper.
Serving the Swedish Way
Serve Jansson's Frestelse warm.
It should be creamy enough to spoon rather than slice.
Traditional accompaniments include:
- Swedish crispbread
- Hard Swedish cheese
- Fresh flat-leaf parsley
- A cold beer or julmust at Christmas
On the Christmas table, it is served alongside:
- Meatballs
- Christmas ham
- Pickled herring
- Prinskorv
- Crispbread
- Cheese
- Mustard and other condiments
The Swedish Cravings Signature Texture
A perfect Jansson's should have:
- Tender but distinct potatoes.
- Sweet, deeply softened onions.
- Cream that has thickened into a silky sauce.
- A clear but balanced ansjovis flavour.
- A deeply golden, crisp breadcrumb topping.
The casserole should never be watery.
Nor should the potatoes collapse into mush.
Swedish Cravings Tips
- Use genuine Swedish ansjovis whenever possible.
- Reserve the brine and use it carefully.
- Do not rinse the cut potatoes.
- Cook the onions slowly.
- Keep the potato matchsticks relatively uniform.
- Layer the ingredients instead of mixing them together.
- Bake slowly until fully tender.
- Finish briefly at high heat for a crisp top.
- Rest before serving.
- Serve warm rather than piping hot.
Storage and Reheating
Jansson's Frestelse keeps exceptionally well.
Refrigerate leftovers for up to three days.
Reheat uncovered in a 175°C / 350°F oven until hot throughout.
Avoid microwave reheating when possible, as it softens the topping.
The casserole can also be assembled several hours before baking.
Keep refrigerated and add the breadcrumb topping immediately before baking.
Frequently Asked Questions
Can I use Mediterranean anchovies?
No.
They are significantly saltier and lack the sweet-spiced brine of Swedish ansjovis.
The finished dish will taste completely different.
Can I make Jansson's ahead?
Yes.
Assemble the casserole several hours in advance and refrigerate.
Add the breadcrumbs and butter immediately before baking.
Can I freeze Jansson's?
Yes.
Freeze the baked casserole for up to two months.
Thaw overnight in the refrigerator before reheating in the oven.
Why is my Jansson's watery?
The potatoes may have been rinsed, the cream may not have baked long enough, or the casserole may not have rested before serving.
Why are my potatoes still hard?
The matchsticks may be too thick or the casserole may have been baked at too high a temperature.
Shop Authentic Swedish Favourites
At Swedish Cravings, we share the foods and traditions that belong on Swedish celebration tables.
Complete your smörgåsbord with favourites such as:
Everything is carefully selected to help you create a genuine Swedish celebration table wherever you live.
A Taste of Swedish Christmas
Some dishes belong to everyday life.
Jansson's does not.
It belongs to crowded Christmas tables, candles glowing in dark winter windows, glasses being raised, and families gathering around the smörgåsbord.
The Swedish Cravings Signature Jansson's Frestelse respects the simple beauty of the original while refining the details that make the casserole exceptional: sweet onions, silky cream, genuine Swedish ansjovis, tender potatoes, and a deeply golden browned-butter crust.
Whether you're celebrating Christmas, Easter, Midsummer, or simply cooking something that reminds you of home, we hope this recipe becomes part of your own Swedish traditions.
Happy cooking, smaklig måltid, and welcome to the taste of Sweden.
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