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    Home » Instant Pot Recipes » Instant Pot Au Gratin

    Instant Pot Au Gratin

    Published: Nov 16, 2020 · Modified: Jan 12, 2021 | This post may contain affiliate links·

    402 shares
    Jump to Recipe Print Recipe
    Instant Pot Au Gratin

    Instant Pot Au Gratin is made with potatoes and cauliflower baked in a cheesy, flavor-packed sauce and finished with a golden-brown topping. A delicious side for a festive menu!

    Close up of a spoon in a bowl of au gratin
    Jump to:
    • Why this recipe works
    • List of Ingredients
    • Step-by-Step Instructions
    • Expert Tips
    • FAQs
    • Instant Pot Au Gratin

    This delicious au gratin dish combines ingredients that define comfort – potatoes, cream, cheese. Au gratin hits all the right notes, especially during the colder months. With a gooey, cheesy, sauce that’s packed with flavor – we’re talking paprika, nutmeg, thyme, and gruyere cheese here – this dish is the kind that you’d want to eat just as it comes out of the oven. I love having this dish as a meal by itself, but it also goes perfectly well as a side for a festive menu.

    A bowl of au gratin next to a casserole dish with au gratin

    Why this recipe works

    • Use the Instant Pot for pre-cooking veggies and making the sauce for the casserole
    • Stock is used for cooking the potatoes and cauliflower for increasing flavor
    • Delicious crunchy golden crumb on top - so much better than plain Au Gratin!

    List of Ingredients

    To make this Instant Pot Au Gratin, you will need:

    Potatoes: Use Russet potatoes or Yukon Gold, or any variety of potatoes that you prefer. Slice the potatoes thick – if using a mandolin slicer, use the biggest blade.

    Cauliflower: I have used cauliflower in this recipe, however, if you like the classic version of Au Gratin, you can skip this, and replace with more potatoes.

    Cheese: For the sauce, I have used Gruyere cheese. You can also use Parmesan or Cheddar.

    Stock: Use either vegetable or chicken stock

    Other ingredients: Butter, Onion, garlic, heavy cream, paprika, nutmeg, thyme, bread crumbs

    Step-by-Step Instructions

    In this recipe, we cook the potatoes and cauliflower in the Instant Pot, and then make the sauce in the Instant Pot. After assembling the dish and adding the topping, we finish it off by baking it in the oven.

    Add 1 cup chicken stock or vegetable stock to the Instant Pot. To this, add the sliced potatoes and cauliflower florets.

    Adding butter to the Instant Pot after cooking potatoes and cauliflower

    Pressure cook the veggies in the Instant Pot for 1 minute on the 'High' setting. Once done, perform a quick release of pressure. Take out the veggies and reserve the stock that's left over.

    In the empty Instant Pot, set to 'Saute' mode and add a tablespoon of butter.

    Collage of steps for making Au Gratin in the Instant Pot including scooking potatoes and cauliflower in stock

    Add finely chopped onion (red or white) and minced garlic cloves. Saute until the onions are translucent - for 4- 5 minutes. Hit Cancel on the Instant Pot.

    Adding garlic and onions to the Instant Pot and sauteeing them in butter

    Add 1 cup heavy cream and stir it in. Then add paprika, nutmeg, thyme and stir that in as well.

    Adding heavy cream and spices to the sauce in the Instant Pot

    Add a 1+1/2 teaspoons of all-purpose flour and mix that in to form a smooth sauce. Break up any lumps that may form. You can use a whisk for this.

    Add 1 cup grated cheese - I have used Gruyère here, but you can use mozzarella or cheddar as well.

    Adding flour and Gruyeres cheese to the sauce in the Instant Pot

    Mix together all the ingredients to form a thick sauce. My sauce was a bit too thick so I thinned it out with some of the reserved stock. You can add more cream at this point if you want a richer sauce.

    Thinning out the sauce in the Instant Pot with stock

    Grease a baking dish with butter. Add the cooked potatoes and cauliflower.

    Adding potaoes and cauliflower to a greased baking dish

    Pour over the sauce, and keep aside which you prepare the topping.

    For the topping, mix together breadcrumbs with some melted butter.

    Adding sauce and topping to a baking dish before baking Au Gratin

    Sprinkle the topping over the filling and bake the dish for 5 minutes at 350 F or 180 C, until the topping is nice and golden brown.

    Baking the Au Gratin and taking it out of the oven

    Expert Tips

    Potatoes and cauliflower: I like making this Instant Pot au gratin with a mix of potatoes and cauliflower. You can choose to skip the cauliflower and use all potatoes. Use Russet potatoes or Yukon Gold. Feel free to add in peas or carrots if you prefer. Slice the potatoes thick – if using a mandolin slicer, use the biggest blade.

    Using stock to pre-cook the veggies: Using the Instant Pot, pressure-cook the veggies in chicken or vegetable stock. The stock will be infused in the potatoes and cauliflower, giving it a huge boost of flavor.

    Cheese for the sauce: I love using grated Gruyere cheese for the sauce, but you can also use Parmesan or Cheddar or a mix of both. If your sauce is too thick, thin it out with some of the reserved stock.

    Make a golden brown topping: I like to give the classic au gratin recipe some extra texture with a delicious golden-brown topping made with bread crumbs. I use melted butter and bread crumbs for the topping , you can also add cheese for added flavor.

    FAQs

    What does au gratin mean in cooking?

    An au gratin dish means simply refers to a baked dish with a golden-brown topping. The topping is usually made with breadcrumbs or cheese or a combination of both. In this recipe, we’re going with breadcrumbs mixed with melted butter.

    What is the difference between scalloped potatoes and au gratin potatoes?

    Both Au Gratin and scalloped potatoes have a lot in common, and a few minor differences. While scalloped potatoes are made entirely with potatoes baked in a cream-based sauce, in an Au Gratin, there is cheese in addition to the cream.
    This article by The Kitchn explains the differences between the two dishes. Differences aside, both dishes are made with sliced potatoes coated in a delicious sauce, and then finished off by baking in the oven – whichever way you prefer, you are guaranteed to love the results.

    Spoon scooping up Au Gratin from a baking dish

    More Instant Pot Sides

    Smashed potatoes

    Pesto Potato Salad

    Instant Pot Sweet Potatoes

    Potato bacon salad

    Cloe-up of a Bowl of au gratin with a spoon in it

    Instant Pot Au Gratin

    Shinta
    Instant Pot Au gratin is made with potatoes and cauliflower in a cheesy, flavourful sauce. This simple and delicious comfort meal is finished off with a a golden-brown topping. A delicious side that is perfect for a festive menu!
    5 from 7 votes
    Print Recipe Pin Recipe
    Prep Time 15 minutes mins
    Cook Time 15 minutes mins
    Course Main Course, Side Dish
    Cuisine French
    Servings 4
    Calories 612 kcal

    Equipment

    • Baking Dish
    • Instant Pot

    Ingredients
     
     

    • For the filling and sauce:
    • 1 cup chicken stock can be replaced with vegetable stock
    • 4 medium-sized potatoes thickly sliced
    • 1/2 small cauliflower cut into florets
    • 1 tablespoon butter
    • 1 small onion finely chopped
    • 4 cloves garlic minced
    • 1 cup heavy cream
    • 1 teaspoon paprika
    • ½ teaspoon nutmeg
    • 1 teaspoon thyme
    • 1 cup grated cheese use gruyere or cheddar or mozzarella
    • For the topping:
    • 1/3 cup bread crumbs
    • 2 tablespoons butter melted
    • Extra butter to grease the baking dish

    Instructions
     

    • Add 1 cup chicken stock or vegetable stock to the Instant Pot.
    • Then add the sliced potatoes and cauliflower florets, over the stock.
    • Hit the Pressure Cook or Manual button on the Instant Pot and pressure cook the potatoes and cauliflower for 1 minute on the 'High' setting. Once the cooking cycle is complete, perform a quick release of pressure.
    • Take out the partially-cooked veggies and reserve the leftover stock.
    • In the empty Instant Pot, set to 'Sauté' mode and add a tablespoon of butter.
    • Add finely chopped onion and minced garlic cloves.
    • Sauté until the onions are translucent - for around 4- 5 minutes. Hit Cancel on the Instant Pot.
    • Add 1 cup heavy cream and stir it in. Then add paprika, nutmeg, thyme and stir it into the cream.
    • Add a 1+1/2 teaspoons of all-purpose flour and mix it in to form a smooth sauce. Break up any lumps that may form.(You can use a whisk for this).
    • Add 1 cup grated cheese.
    • Mix together all the ingredients to form a thick sauce. If your sauce is too thick, add some of the reserved stock to thin it out. After cooking the sauce for 3 minutes, turn off the Instant Pot.
    • Grease a baking dish with butter. Add the cooked potatoes and cauliflower to the baking dish.
    • Pour over the sauce, and keep this aside while you prepare the topping.

    For the topping:

    • Mix together the breadcrumbs with the melted butter.
    • Sprinkle the topping over the filling and bake the dish for 5 minutes at 350 F or 180 C, until the topping is nice and golden brown.

    Notes

    • Preferably, use Russet potatoes or Yukon Gold potatoes. The potatoes have to be sliced thick, if sliced too thin, they will cook too fast in the Instant Pot. 
    • Use either vegetable stock or chicken stock for cooking the vegetables.
    • Gruyere cheese works best for this recipe, but you can also use Parmesan or Cheddar or a mix of both.
    • You can add extra Parmesan to the bread crumb topping for more flavor. 

    Nutrition

    Calories: 612kcalCarbohydrates: 45gProtein: 19gFat: 42gSaturated Fat: 26gCholesterol: 136mgSodium: 470mgPotassium: 1311mgFiber: 8gSugar: 4gVitamin A: 1690IUVitamin C: 63mgCalcium: 350mgIron: 8mg
    Keyword Au gratin, Instant Pot Au Gratin, Potato au gratin
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    402 shares

    Reader Interactions

    Comments

    1. Beth says

      November 21, 2019 at 9:03 pm

      5 stars
      I love using my instant pot to make delicious dishes like this one! I also love the fun twist of cauliflower in the classic au gratin!

    2. Erika says

      November 21, 2019 at 9:00 pm

      5 stars
      I love au gratin dishes, and even more that this is made in the Instant Pot.

    3. Matt Freund says

      November 21, 2019 at 8:59 pm

      5 stars
      This looks really good. I want this.

    4. Katie says

      November 21, 2019 at 8:58 pm

      5 stars
      Made this for the family and it was a hit!

    5. Rebecca says

      November 21, 2019 at 8:43 pm

      5 stars
      great idea adding cauliflower to this au gratin! it looks sooo good!

    5 from 7 votes (2 ratings without comment)

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    Shinta Simon

    is always on the lookout for inspiration for her next meal. She shares recipes for family meals, Instant Pot recipes and more

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