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Fluffy Finnish Mashed Potato Casserole (Perunasoselaatikko)

Nov 15, 2023 · Leave a Comment

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Finnish mashed potato casserole is a flawlessly versatile side dish. As we head deeper into the season of cozy comfort foods, meatloaves, turkeys, et cetera, you’ll want this one in your repertoire. This casserole is creamy, buttery and oh-so-light and fluffy: the quintessential mashed potatoes. The bread crumb topping adds some pleasing crunchy contrast.

finnish mashed potato casserole

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Table of Contents

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  • Tools & Equipment for Finnish Mashed Potato Casserole
  • Ingredients for Finnish Mashed Potato Casserole
  • The Process: How to Make Finnish Mashed Potato Casserole
  • Alternatives & Frequently Asked Questions
    • How Should I Serve & Store Finnish Mashed Potato Casserole?
    • Alternative: Plain Ol’ Finnish Mashed Potatoes
  • Finnish Mashed Potato Casserole (Perunasoselaatikko)
    • Pin for later:
  • What Should I Make Next?

Tools & Equipment for Finnish Mashed Potato Casserole

  • Large pot
  • Potato masher
  • Colander
  • Casserole dish
  • Small bowl
  • Fork or whisk

Ingredients for Finnish Mashed Potato Casserole

  • 2.5 lbs russet potatoes
  • 2 eggs, beaten
  • 1/3 cup heavy cream
  • 2/3 cup whole milk: if you prefer, you can use all milk or cream, or play around with the proportions a bit! Or just use 1 cup of half and half.
  • Fine sea salt, to taste (at least a couple teaspoons!)
  • 6 Tbsp unsalted butter (divided)
  • 1/2 cup breadcrumbs

The Process: How to Make Finnish Mashed Potato Casserole

Peel and quarter potatoes and place in a large pot. Cover potatoes with water and generously salt the water (remember most of this water goes down the drain! Salt it well)

Boil potatoes until fork-tender, usually 15-20 minutes. Drain the potatoes and transfer to a mixing bowl, or back to the pot. While potatoes are boiling, preheat oven to 375 degrees. Butter a casserole dish and set aside.

Mash the potatoes well. Add 4 Tbsp butter and mash thoroughly. Taste and add salt until it tastes right to you! This will depend on how much salt you put in the water, as well as on your personal taste.

Beat the milk and eggs together and add to the potatoes. Mash thoroughly again.

Transfer the potatoes to a buttered casserole dish. Sprinkle breadcrumbs on top, then top with the remaining butter, cut into slivers. Or you can melt the butter, mix it with the breadcrumbs and sprinkle the whole mixture over the casserole.

mashed potato casserole ready to bake

Bake 20-25 minutes, until the top is browned. Enjoy hot!

Alternatives & Frequently Asked Questions

How Should I Serve & Store Finnish Mashed Potato Casserole?

Serve hot, alongside any number of classic, comforting main dishes! Pork & Apple Meatloaf is one such example.

Store covered in the fridge, for 3 days or so.

Alternative: Plain Ol’ Finnish Mashed Potatoes

If you’d rather just make some plain mash and skip baking & the casserole dish, you can. Boil and mash the potatoes, with the butter, milk & cream, and salt to taste. Serve the mash hot!

I’m told that some Finns like to add a minced onion to their mashed potatoes as well- try that idea!

Finnish Mashed Potato Casserole (Perunasoselaatikko)

Carol Scheck
Light, fluffy mashed potatoes, with a bread crumb topping for some crunch. The perfect side dish!
Print Recipe Pin Recipe
Prep Time 30 minutes mins
Cook Time 25 minutes mins
Total Time 55 minutes mins
Servings 1 .5 qt casserole

Ingredients
  

  • 2.5 lbs russet potatoes
  • 2 eggs beaten
  • 1/3 cup heavy cream
  • 2/3 cup whole milk
  • Fine sea salt to taste (at least a couple teaspoons!)
  • 6 Tbsp unsalted butter divided
  • 1/2 cup breadcrumbs

Instructions
 

  • Peel & quarter potatoes and place in a large pot. Cover potatoes with water & generously salt the water (remember most of this water goes down the drain! Salt it well)
  • Boil potatoes until fork-tender, usually 15-20 minutes. Drain the potatoes and transfer to a mixing bowl.
  • While potatoes are boiling, preheat oven to 375 degrees. Butter a casserole dish and set aside.
  • Mash the potatoes well. Add 4 Tbsp butter and mash thoroughly. Taste and add salt, to taste.
  • Beat the milk and eggs together and add to the potatoes. Mash thoroughly again.
  • Transfer the potatoes to a buttered casserole dish.
  • Sprinkle breadcrumbs on top, then top with the remaining butter, cut into slivers.
  • Alternatively, melt the butter and mix with the breadcrumbs, then sprinkle on the entire mixture.
  • Bake 20-25 minutes, until the top is browned.
  • Enjoy hot!

Notes

You can use a different ratio of cream:milk, as long as it equals about 1 cup of liquid! Use all half and half, all milk, all cream...or some other combination, whatever suits you.
Tried this recipe?Let us know how it was!

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Did you try this recipe? Let me know what you think in the comments!

What Should I Make Next?

Try some more “laatikkos” (casseroles!)

Finnish Carrot Casserole

Finnish Cabbage Casserole

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Hi, I’m Carol! I’m a wife, a mom of 4, and a homemaker. I’m sharing about DIY home updates, garden, and food- both American classics and Finnish cuisine! More about me here

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