If you are searching for the ultimate winter side dish, look no further than this rich and creamy Potato Casserole. This recipe is inspired by the famous Swedish dish, Jansson’s Temptation, and it is a masterpiece of simple, satisfying flavors. It takes humble potatoes and transforms them into a bubbling, savory bake, the perfect companion to any hearty meal. Honestly, sometimes I make a big batch and just eat it on its own, because it is that comforting. Get ready for a side dish that steals the show.
What is Potato Casserole
A potato casserole is a broad term for any dish containing potatoes baked together in the oven. The most common versions involve cream or milk and are known worldwide as scalloped potatoes, potatoes dauphinoise, or potatoes gratin. My recipe is a special version of these, based on Jansson’s Temptation. This Swedish classic is unique because it includes savory ingredients that elevate it beyond a simple creamy bake. My adaptation of the casserole includes layers of thinly cut potatoes, caramelized onions, and, most importantly, a wonderful umami hit from anchovies. No one knows who Jansson was, but after a single bite, you will understand why he was tempted!
Punching Above its Weight
It is truly amazing how such a simple list of ingredients—potatoes, onions, dairy, and anchovies—can combine to create a dish this glorious. The key is in the layering of flavors. Note that my version uses salted anchovies, which provide a rich, savory umami depth, instead of the classic Swedish pickled sprats typically used in Jansson’s Temptation. This slight difference makes the dish more accessible while delivering the same beautiful, complex flavor that defines this Scandinavian favorite.
The Onion Secret
The onions are absolutely essential for both flavor and texture in this dish. We are going to take the time to properly caramelize them in the pan until they are soft, golden, and sweet. This process unlocks a depth of flavor that a raw onion could never provide. Mixing the finely chopped anchovies into the onions at the very end ensures the savory, salty fish breaks down completely and enriches the sweet onions even further.
The Potato Secret
For this casserole, we are cutting the potatoes into thin matchsticks rather than slices. This is a crucial technique because it means the potatoes cook through much quicker in the oven, eliminating the need for any precooking.
We are also ensuring the liquid stays rich by whisking together the milk and sour cream. The sour cream not only adds a wonderful tangy flavor but also thickens the dairy mixture, helping it cling beautifully to the potatoes during the bake.
Layering
To ensure every bite of your potato casserole is evenly seasoned and bursting with flavor, layer the potatoes and the onion mixture in the baking dish. Start with a layer of potato, then a layer of the caramelized onions and anchovies, repeating until you have used all your ingredients. Season each layer with salt and pepper as you go, ensuring the flavor is integrated throughout. Finally, pour the milk and sour cream mixture over everything, scatter the top with breadcrumbs for a crispy crust, and bake until golden.
What to Serve with Potato Casserole?
While this dish is often paired with fish in the Nordics due to the savory seafood element, do not feel limited. The anchovies mostly add an intense umami flavor rather than tasting explicitly “fishy,” so this casserole goes equally well with grilled or roasted meat. It is a fantastic accompaniment to a perfectly seared steak or a rich roast lamb. The creamy texture and savory flavor are robust enough to stand up to any meat, creating a perfect, well-balanced plate.
And More…
Looking for more hearty potato dishes for the winter? Try one of these:
- Mashed Potatoes and Gravy
- Parmesan Roasted Potatoes
- Pumpkin Potato Latkes
- Loaded Twice Baked Potatoes
- Purple Mashed Potatoes
Conclusion
This Potato Casserole, inspired by Jansson’s Temptation, is a triumph of comfort food built on simple, affordable ingredients. It is creamy, savory, and has a rich, complex flavor thanks to the caramelized onions and subtle umami of the anchovies. I promise, the slow, creamy bake is worth every minute of oven time. Let me know what you think in the comments.
Potato Casserole
Ingredients
- 3 tbsp butter
- 2 onions peeled and sliced
- anchovies
- 2 1/2 lb potatoes peeled, sliced in chips
- 2 cups milk
- 1 cup sour cream
- 2 tbsp bread crumbs
- salt and pepper
Instructions
- Preheat the oven to 350°F.
- Heat 2 tbsp butter in a pan over medium heat. Add the onions and cook slowly for about 20 minutes until deep brown and caramelised. Add the anchovies and cook for 1-2 minutes more until they dissolve into the onions.
- In the meantime, cut the potatoes into matchsticks. Use the remaining butter to grease a baking dish.
- Layer the potatoes with the onions in the baking dish, seasoning as you go.
- Whisk the milk and sour cream together and pour over the potatoes in the dish. Scatter with the breadcrumbs.
- Bake for about 45 minutes until the potatoes are tender and golden brown on top.
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