Rich and Creamy Vegan Potatoes Au Gratin

Vegan potatoes au gratin

The Spruce

Prep: 10 mins
Cook: 40 mins
Total: 50 mins
Servings: 3 to 4 servings
Nutritional Guidelines (per serving)
531 Calories
20g Fat
79g Carbs
11g Protein
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Nutrition Facts
Servings: 3 to 4
Amount per serving
Calories 531
% Daily Value*
Total Fat 20g 26%
Saturated Fat 4g 19%
Cholesterol 0mg 0%
Sodium 1622mg 71%
Total Carbohydrate 79g 29%
Dietary Fiber 9g 32%
Protein 11g
Calcium 175mg 13%
*The % Daily Value (DV) tells you how much a nutrient in a food serving contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.
(Nutrition information is calculated using an ingredient database and should be considered an estimate.)

Do you love potatoes au gratin, but need a vegan recipe? This baked potato casserole dish is covered in a rich and creamy cheese sauce that has no dairy ingredients. This vegan version makes a thick dairy-free sauce out of nutritional yeast instead.

While there are many brands of vegan cheese on the market, you don't necessarily need them for the gratin in potatoes au gratin. You'll find that nutritional yeast can do the trick as well.

If you like this vegan baked potatoes au gratin, you might like this similar recipe for vegan scalloped potatoes. You can also enjoy spicy vegan scalloped potatoes with green chilies as another potato casserole variation for dinner.


  • 3 potatoes (sliced about 1/3 inch thick)
  • 1 onion (chopped)
  • 1 clove garlic (minced)
  • 1 tablespoon, plus 1/4 cup olive oil
  • 1/2 cup vegan margarine
  • 1/2 cup flour
  • 3 1/2 cups water (boiling)
  • 1 teaspoon salt
  • 2 tablespoons soy sauce
  • 1/4 teaspoon turmeric
  • 3/4 cup nutritional yeast
  • Optional: 1/2 to 3/4 teaspoon paprika

Steps to Make It

  1. Gather the ingredients.

    Ingredients for vegan potatoes au gratin
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  2. Preheat the oven to 350 F.

  3. Bring two pots of water to a boil, one to pre-cook the potato slices (unless you will do that in the microwave instead), and one for boiling water for the sauce.

    Bring water to a boil
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  4. Slice the potatoes about 1/3-inch thick.

  5. Add potatoes to boiling water and cook for 5 to 6 minutes. Alternatively, you can place them in a vegetable steamer in the microwave for 5 minutes. Don't overcook and have your slices turn to mashed potatoes. (You need to pre-cook the potatoes for them to be properly done after baking the casserole.)

    Add potatoes to boiling water
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  6. Drain well, then spread half the potatoes in a casserole dish.

    Spread the potatoes in a casserole dish
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  7. In a large skillet, sauté onions and garlic in a tablespoon of olive oil for 3 to 4 minutes.

    Saute onions and garlic
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  8. Reduce heat and add vegan margarine and flour, stirring continuously until thickened.

    Reduce heat
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  9. Add boiling water, salt, soy sauce, and turmeric, frequently stirring until thickened.

    Add boiling water, salt, and soy sauce
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  10. Add remaining 1/4 cup olive oil and nutritional yeast, stirring again just until well mixed.

    Add olive oil
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  11. Pour half of the sauce mixture over half of the potatoes in the casserole dish.

    Pour half of the potatoes in a casserole dish
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  12. Add a layer of the remaining potatoes.

    Add layer of remaining potatoes
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  13. Then cover with the remaining sauce.

    Cover with remaining sauce
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  14. Cover and bake for 10 minutes.

    Cover the casserole dish
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  15. Then uncover, and bake for an additional 10 to 12 minutes.

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  16. Remove the casserole from the oven. Sprinkle the top with paprika, if desired.

    Burned potatoes
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  17. Allow for the potatoes au gratin to cool for 10 minutes before serving, as the sauce will thicken as it cools.

    Potatoes au gratin
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  18. Enjoy this dish with a side salad or roasted vegetables.