Vegan Potato Bake (Potatoes au Gratin)

Vegan Potato Bake (Potatoes au Gratin)

with Zucchini and Mushrooms

Recipe by
Reviewed by Arturs Arnicans
Prep Time: 15m
Cook Time: 50m
Total Time: 1h 5m
Temp.: 355 °F
Servings: 6
Difficulty: Easy
4.9 (18 Reviews)
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Ingredients

Adjust servings:

For potatoes and zucchini:

For cashew sauce:

Optional toppings:

Nutritional Information

270
Calories
13.1g
Fat
26.3g
Carbohydrates
9.6g
Protein
0mg
Cholesterol
2.5g
Saturated Fat
Vegan Potato Bake (Potatoes au Gratin)

Recipe Description

Vegan Potato Bake (Potatoes au Gratin) not only makes a hearty main or side dish for your holiday dinner, but it is also great for your weeknight dinner. Besides, this satisfying dish is really easy to master. Furthermore, this recipe doesn’t contain fancy ingredients and is ready in about an hour.

Of all the ways to cook potatoes, au gratin is maybe my favorite. And if I am in the mood for healthier potatoes au gratin, then this recipe hits the spot perfectly. It is dairy-free, gluten-free, vegan and paleo-friendly. I use cashews, vegetable broth and non-dairy milk to create a rich sauce for this casserole. Sautéing mushrooms, onions, and garlic delivers a flavorful layer, in-between sliced potatoes, zucchini, and dairy-free vegan sauce. The bake is simple to make if you have a mandolin. But if you don’t, then slice the potatoes as thinly as you can with the help of a sharp chef’s knife. Also, make sure that you slice zucchini a bit thicker than potatoes.

To make the Vegan Potato Bake (Potatoes au Gratin), you will need the following ingredients:

Ingredients for Vegan Potato Bake (Potatoes au Gratin)

Steps to make

  1. 1

    Preheat oven

    Step 1 - Vegan Potato Bake (Potatoes au Gratin)

    Preheat the oven to 355 °F and grease a 10x7-inch baking dish.

  2. 2

    Cook onion and mushrooms

    5 min
    Step 2 - Vegan Potato Bake (Potatoes au Gratin)

    In a pan, heat 1 tablespoon olive oil. Add 7 ounces sliced mushrooms and 1 sliced onion. Cook, stirring occasionally, for 4-5 minutes or until lightly browned.

  3. 3

    Add garlic

    1 min
    Step 3 - Vegan Potato Bake (Potatoes au Gratin)

    Add 3 cloves minced garlic and cook, stirring, 1 more minute, then set aside.

  4. 4

    Prepare sauce

    3 min
    Step 4 - Vegan Potato Bake (Potatoes au Gratin)Step 4 - Vegan Potato Bake (Potatoes au Gratin)

    Drain and rinse 1 cup soaked cashews. In a blender, combine cashews, 1 cup vegetable broth, 1 cup non-dairy milk or water, ½ teaspoon salt, freshly ground black pepper to taste, and 4 tablespoons nutritional yeast if using. Blend for 1-2 minutes until smooth. Pour into a small saucepan and heat through.

  5. 5

    Spread potatoes and zucchini

    1 min
    Step 5 - Vegan Potato Bake (Potatoes au Gratin)

    Layer half of the sliced potatoes and zucchini in the baking dish.

  6. 6

    Top with sauce

    1 min
    Step 6 - Vegan Potato Bake (Potatoes au Gratin)

    Top with half of the cashew sauce and spread evenly.

  7. 7

    Add mushrooms

    1 min
    Step 7 - Vegan Potato Bake (Potatoes au Gratin)

    Spread over half of the mushroom-onion mixture.

  8. 8

    Repeat layers

    3 min
    Step 8 - Vegan Potato Bake (Potatoes au Gratin)

    Repeat the layers and make sure that all vegetables are covered with the sauce.

  9. 9

    Bake

    50 min
    Step 9 - Vegan Potato Bake (Potatoes au Gratin)

    Bake for about 50 minutes or until the potatoes are tender and soft. You may want to cover the dish with a piece of aluminum foil or parchment paper if it gets too brown on top. Sprinkle vegan cheese on top if using about 5-10 minutes before the bake is done.

  10. 10

    Serve

    Step 10 - Vegan Potato Bake (Potatoes au Gratin)

    Serve garnished with chopped green onions if you wish.

If you give this Vegan Potato Bake (Potatoes au Gratin) recipe a try, please leave a comment below and don’t forget to tag @cookmerecipes on Instagram if you take a picture of your dish.

About the author

Nina Cole

Nina dreams of gender equality and for women all over the world to feel empowered and enjoy the same freedom she has. She’s a careful consumer, believing that by being more conscious about the way we live we can make the world a better place! Already a vegetarian, she uses animal products sparingly and tries to produce as little waste as possible. Most of her recipes are vegan as a result!

Recipe Reviews

Have you made this recipe? Share your experience and help other cooks!

★★★★★
★★★★★
4.9 out of 5 (18 reviews)
Chris Thompson
March 17, 2025
Verified

Delicious vegan bake. My wife and I enjoyed this for a cozy dinner. The flavors were amazing and the instructions were easy to follow. We loved how simple it was to make a healthy dish that didn't skimp on taste.

Quinn
October 18, 2024
Verified

Super yummy recipe!

Peter Johnson
May 9, 2024
Verified

I made this for friends last weekend and we all loved it. So easy and delicious, perfect for any gathering.

Eduardo
November 1, 2023
Verified

Hice esta receta para la cena familiar el fin de semana. Todos se enamoraron de cómo los sabores se mezclaron. Me encantó que era tan fácil y muy sano.

Yvonne
October 28, 2023
Verified

Loved this dish

Quenette
October 10, 2023
Verified

OMG! This Potato Bake was a hit at our family dinner! Super easy to whip up, and my kids licked their plates clean. Def doing this again! 😊

Max
October 10, 2023
Verified

Absolutely loved it.

Vicky Jameson
October 5, 2023
Verified

I made this for my family's Sunday dinner and they are still raving about it! It's so simple and delicious.

J-Dawg
August 10, 2023
Verified

Man, this vegan potato bake was a total hit at our fam dinner! So easy and delish!

Ethan
April 19, 2023
Verified

Delicious! Tried it for a dinner party and everyone loved it. The creamy texture was a hit!

Bree
April 6, 2023
Verified

Yummy! Made this for our Friday night dinner and everyone loved it. The creamy texture made it taste so indulgent even though it’s healthy! Will def make again.

George Anderson
July 21, 2022
Verified

I made this Vegan Potato Bake for our family dinner and it was a hit! Even my kids asked for seconds. The simplicity of using just a few ingredients is a big plus. I even had a little help from my son with slicing the potatoes. This will be our go-to recipe now.

Amy
July 16, 2022
Verified

Delicious! Whipped this up for my fam, they couldn’t believe it was vegan.

Sam Robinson
June 17, 2022
Verified

Absolutely tasty dish.

Laura
February 1, 2022
Verified

OMG, this Potato Bake is da bomb! Made it for my fam on movie night, and they all went crazy for it! It's super easy and tastes sooo good. Can't believe it's vegan! You gotta try it!

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