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5 from 4 votes

Instant Pot Sweet Potato Gratin

Instant Pot sweet potato gratin is quicker than its oven-baked version but tastes equally delicious. Sweet potatoes, rich sauce are layered & topped with cheese.
Prep Time20 mins
Cook Time30 mins
Total Time50 mins
Course: Dinner, Lunch, Side Dish
Cuisine: French
Keyword: Sweet Potato Gratin Recipe
Servings: 8 Portions
Calories: 426
Author: Julia


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  • Wash, peel and thinly slice sweet potatoes. Place them in a large bowl and add salt, pepper and dried garlic. Mix until the slices are coated in seasoning.
  • To make the creamy sauce: heat the oil in a small-medium sauce pan. Add flour and whisk until well combined. Cook for about a minute. Now add the cream while constantly stirring. Bring this to a boil (while stirring) and turn off the heat. Stir in grated cheese and butter (optional).
  • Cover the bottom of your springform pan with 2-3 layers of sweet potato slices, spread about 3 tablespoons white sauce over. Continue until you have used up all your sweet potato slices and white sauce. Finally top with a generous amount of grated cheese.
  • Cover the pan with tin foil. Place steam rack (with handles) in your instant pot. Add the water and place the pan inside. Cover with lid and lock.
  • Turn the steam release to “SEALING”. Press “MANUAL” and set the timer to 30 minutes.
  • When the cooking cycle is finished, wait until the steam is released naturally (until the pin drops down). Take the pan out, let it cool down a bit and serve.


  1. This recipe was made in a 6 quart/6 liter Instant Pot.
  2. Springform pan size: 7 inch/18cm wide and 3.5 inch/9cm deep.
  3. The cooking time does not include time needed for the pot to come to pressure and also time needed to release the pressure.
  4. If you serve this immediately, the sauce will be runny and cheese nicely melted. However, the gratin will not hold its shape.
  5. If you want to divide into individual portions and slice it nicely, wait until it’s cooled down.
  6. This gratin can be made ahead and reheated, if needed.
  7. If you don’t have a pressure cooker, follow the same instructions but place it in the oven instead of Instant Pot. The baking time will be somewhere between 80-90 minutes.
Nutrition Facts
Instant Pot Sweet Potato Gratin
Amount Per Serving
Calories 426 Calories from Fat 315
% Daily Value*
Fat 35g54%
Saturated Fat 19g119%
Cholesterol 106mg35%
Sodium 482mg21%
Potassium 362mg10%
Carbohydrates 21g7%
Fiber 3g13%
Sugar 4g4%
Protein 8g16%
Vitamin A 13180IU264%
Vitamin C 2mg2%
Calcium 205mg21%
Iron 1mg6%
* Percent Daily Values are based on a 2000 calorie diet.
** Happy Foods Tube 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 links to
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