Potato and Mushroom Gratin

Potato and Mushroom Gratin

Potato and Mushroom Gratin

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Sliced mushrooms, gruyere cheese and potatoes in a basket are being prepped for Potato and Mushroom Gratin.

With Easter just around the corner, you’ll want to be dinner ready for family and friends. Hopefully, with some luck, the Covid-19 gathering restrictions will ease in my area and a modest gathering can take place. I do miss my family and friends, and I miss cooking for them. It’s the best part of any gathering, in my opinion. You’re gonna love this easy and delicious Potato and Mushroom Gratin. It feeds 8 people, it’s easy to assemble and bakes up golden and creamy every time. There’s no messing around with cooking a white sauce, there’s no boilovers and no pre-cooking potatoes. It’s a no-fuss casserole, loaded with earthy mushrooms and Gruyere cheese, and has become my favourite to serve with ham. It’s also fantastic served with roast chicken, pork or grilled steak.

Sauteed mushroom in a stainless steel skillet that have been cooked for Potato and Mushroom Gratin.
A prepped and layered Potato and Mushroom Gratin in a red casserole dish ready for the oven.

What makes this potato casserole a winner in my books is the simplicity of the sauce. The mixture of cream and sour cream makes it extra creamy and the sour cream gives a little tang. The sauce is whisked together cold and poured over the potato slices. I find there’s no need to be fussy with the potato arrangement either. Simply toss the slices into the casserole dish and spread them around evenly instead of trying to layer them ever so carefully. If you don’t have a mandolin for thinly slicing the potatoes, that’s no problem, simply slice as thin as you can by hand and cook for the longest time suggested in the recipe. Remember, dinner doesn’t need to be fussy. This simple casserole is not only delicious, but it also feeds a small crowd and is worthy of your family gathering. Enjoy!

Potato and Mushroom Gratin baked golden in a red casserole dish and garnished with chopped green onions.

Potato and Mushroom Gratin baked golden in a red casserole dish and garnished with chopped green onions.
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Potato and Mushroom Gratin

Prep Time 30 minutes
Cook Time 1 hour 10 minutes
Resting Time 10 minutes
Total Time 1 hour 50 minutes
Servings 8 people

Ingredients

  • 2 tbsp salted butter plus more for dish
  • 16 ounces mushrooms, thinly sliced see note
  • 3 cloves garlic, minced
  • 1 cup heavy cream
  • 1 cup sour cream, full fat
  • 1 tsp kosher salt
  • 1/2 tsp pepper
  • pinch nutmeg
  • 1/3 cup milk
  • 2 tbsp flour
  • 2 1/2 pounds russet potatoes see note
  • 6 ounces Gruyere cheese, shredded

Instructions

  • Preheat oven to 375°F and butter a large 3-quart casserole dish.
  • Melt butter in a large skillet over medium-high heat until starting to foam. Add mushroom and cook until lightly browned and the moisture has evaporated. Add minced garlic and continue to cook, stirring often for 1-2 minutes. Set aside.
  • While mushrooms are cooking, whisk together cream, sour cream, salt, pepper and nutmeg. In a separate bowl whisk together milk and flour until smooth. Add to the sour cream and cream and whisk until incorporated. Grate the cheese and set it aside.
  • Peel and thinly slice potatoes. Spread half of the potato slices evenly in the bottom of the prepared casserole dish. Scatter half of the sauteed mushroom and half of the cheese evenly over the potatoes. Repeat with remaining potatoes, mushrooms and cheese.
  • Pour cream mixture evenly over potatoes. Give the pan a gentle shake to help flatten everything out. Cover and bake for 45-60 minutes (this will depend on how thin you've sliced the potatoes) Start checking at 45 minutes. The potatoes should be almost tender in the center. Remove cover and bake for an additional 20 minutes until the top is golden.
  • Remove from oven and allow to rest for 10 minutes before serving. Garnish with chopped fresh parsley or sliced green onions if desired.

Notes

-Russet potatoes work well for this recipe, however,  I've also used red potatoes with equally good results.
-The covered cooking time will vary slightly depending on how thin you've sliced the potatoes.  I find cutting them by hand instead of using a mandolin requires closer to 60 minutes covered.
-I like using cremini mushrooms for this recipe as they have a little more earthiness than regular white mushrooms, however, either work well as does a mix of mushrooms.

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Spinach and Artichoke Gnocchi Gratin

Spinach and Artichoke Gnocchi Gratin

Spinach and Artichoke Gnocchi Gratin baked in small red ceramic cocotte dishes.

Spinach and Artichoke Gnocchi Gratin

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I absolutely love hot, cheesy spinach and artichoke dip. It’s something I can dig into and truly be a little pig about. So today’s post is a riff on one of my favourite dips made into gnocchi casserole form. This will likely be my last warming and hearty casserole of the season because it’s time to think spring…and I’m definitely okay with that. But in the same breath, I didn’t want you to miss out on this wonderfully cheesy and saucy Spinach and Artichoke Gnocchi Gratin.

If you’re not familiar with gnocchi, they are essentially little dumplings often made with mashed potatoes or ricotta cheese. Very simple to make, they cook in minutes and they can take on whatever sauce you want to toss them in. A classic sauce is a butter and sage sauce, but your favourite family meat sauce would be great too. The cheese lover in me can’t help but smother the tender little dumplings in a luscious Gruyere cheese sauce. Enjoy!

Ricotta gnocchi dusted lightly with flour on a tan cutting board in preparation for Spinach and Artichoke Gnocchi Gratin.

Tips for great gnocchi:

Don’t overwork the dough and mix only until combined. This will prevent too much gluten development in the flour.

The grooves are not necessary, however, they help the dumpling hold the sauce. It only takes a few extra minutes to roll each piece over the tines of a fork or gnocchi board.

Cook gnocchi in gently simmering water and only cook until they start to float to the surface. A rapid boil is a little too rough for the tender gnocchi.

Gnocchi can be made and cooked ahead of time. Simply chill or freeze in a single layer on a large baking tray. Once they are frozen they can be stored together in a sealable bag or airtight container. If chilling, cover and use within 2 days.

Spinach and Artichoke Gnocchi Gratin baked in small red ceramic cocotte dishes.

Spinach and Artichoke Gnocchi Gratin baked in small red ceramic cocotte dishes.
Spinach and Artichoke Gnocchi Gratin
Print Recipe
    Servings Prep Time
    4 people 75 minutes
    Cook Time Passive Time
    27-33 minutes 5 minutes
    Servings Prep Time
    4 people 75 minutes
    Cook Time Passive Time
    27-33 minutes 5 minutes
    Spinach and Artichoke Gnocchi Gratin baked in small red ceramic cocotte dishes.
    Spinach and Artichoke Gnocchi Gratin
    Print Recipe
      Servings Prep Time
      4 people 75 minutes
      Cook Time Passive Time
      27-33 minutes 5 minutes
      Servings Prep Time
      4 people 75 minutes
      Cook Time Passive Time
      27-33 minutes 5 minutes
      Ingredients
      Gnocchi
      Servings: people
      Instructions
      Gnocchi
      1. In a large bowl whisk together eggs, ricotta, parmesan cheese, salt and pepper. Stir in flour until dough starts to come together.
      2. Scoop dough onto a floured work surface and knead gently for a few turns until dough is smooth. Shape into a round disk, cover and allow to rest for 10 minutes for the flour to hydrate.
      3. Cut dough disk into 4 equal portions and roll eat portion into an approximate 15" log. Cut each log into 3/4" pieces, dusting lightly with flour as you go to prevent sticking.
      4. Roll each piece across the tines of a fork or gnocchi board, sprinkle with flour as you go to prevent sticking. Dust a large baking tray with flour and lay formed gnocchi in a single layer on the tray. Sprinkle with flour, cover and keep chilled until ready to use.
      Sauce
      1. Melt butter in a large saucepan over medium heat. Whisk in flour until combined. Slowly add 1 cup of hot milk and whisk until the mixture is smooth. Repeat with remaining milk, adding it gradually and stirring until smooth after each addition. Once all the milk has been added, bring to a gentle simmer to ensure flour has thickened to its capacity. Continue to cook for 5-10 minutes, stirring occasionally.
      2. While the sauce is simmering, bring a large pot of lightly salted water to a simmer and preheat oven to 350°F.
      3. Remove the sauce from heat and stir in half of the Gruyere cheese, salt, pepper and nutmeg. Once the cheese has melted stir in spinach and chopped artichokes.
      4. Gently add gnocchi to the simmering water. Cook until all the gnocchi float to the surface which will only take a few minutes. Remove with a slotted scoop to a towel-lined tray to remove excess moisture. Immediately add gnocchi to the sauce and stir gently to combine.
      5. Divide between 4 oven-safe individual cocotte dishes or ramekins that will hold a minimum of 1 1/2 cups. Divide remaining Gruyere cheese evenly over tops and place on a foil-lined baking tray. Bake for 25-30 minutes until bubbly. Turn oven to broil to lightly brown the tops for about 2 minutes.
      6. Remove from oven and allow to rest for a few minutes before serving as they are very hot.
      Recipe Notes

      A single casserole dish can be used instead of individual cocotte dishes if desired.

      It's important to add the cooked gnocchi immediately to the sauce as they will start to stick together if left to sit for too long.

       

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      Affiliate Disclosure

      I may receive compensation for purchases made through this site, at no cost to the purchaser. Compelled to Cook is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com