Go Back
+ servings
A serving of vegan au gratin potatoes au gratin lifted up from the casserole dish.

Vegan Potatoes Au Gratin

Gaby Dimova
These Vegan Au Gratin Potatoes are rich and creamy and make the perfect side to your vegan mains.
5 from 3 votes
Course Side Dish
Cuisine American
Servings 6 -8 servings
Calories 286 kcal

Ingredients
  

  • 2 lb potatoes I used small/medium potatoes
  • 1 large white onion
  • 1 ½ cup 10 oz canned coconut milk
  • ½ cup nutritional yeast
  • 1 cup vegetable stock
  • ¼ cup soaked cashews
  • juice from ½ lemon
  • ½ tablespoon onion powder
  • ½ tablespoon garlic powder
  • ¼ teaspoon turmeric optional, for color
  • 1 teaspoon salt
  • 1 teaspoon pepper

Instructions
 

  • Start by washing and very thinly slicing your potatoes. I recommend using a mandolin as it makes getting thin slices much easier and faster. Also, slice the onion.
  • Arrange the potatoes in a baking dish. I used a 9 x 9 inch dish.
  • To a blender, add the coconut milk, nutritional yeast, veg stock, cashews (make sure you soak them overnight, or for 1 hour in boiling water before making the recipe), lemon juice, onion & garlic powder, turmeric, salt & pepper. Blend on high speed until very smooth and creamy.
  • Pour the liquid on top of the potatoes. Important: make sure that every potato slice is fully covered in the liquid. Any parts that are not covered may not fully cook.
  • Bake the gratin for 50-55 minutes at 400F.
  • Remove the from over, top with vegan parmesan, fresh thyme, and parsley, and enjoy!

Notes

  • Use a mandolin:  I recommend using a mandolin as it makes cutting the potato into thin slices much easier and faster
  • Make sure that every potato slice is fully covered: Any potatoes not covered with the cream sauce may not fully cook. 
  • Store the potatoes in the fridge: Leftover vegan potato gratin will keep for 2-3 days in an airtight container in the fridge. You can also freeze leftovers for up to 1 month. Thaw in the fridge overnight and reheat in the oven.  
  • Soak the potatoes: If you don’t want the potatoes to turn brown while you prepare the rest of the recipe, you can soak them in cold water, drain, pat dry, and then place them in the casserole dish. 
  • If you prefer a crispy top: To get a crispy top you can uncover the vegan au gratin potatoes for a few minutes or turn on the broiler for a minute or two. 

Nutrition

Calories: 286kcalCarbohydrates: 35gProtein: 7gFat: 15gSaturated Fat: 11gPolyunsaturated Fat: 1gMonounsaturated Fat: 2gSodium: 563mgPotassium: 919mgFiber: 5gSugar: 3gVitamin A: 89IUVitamin C: 33mgCalcium: 39mgIron: 4mg
Keyword vegan potato casserole, vegan potato recipes, vegan potatoes au gratin
Tried this recipe?Let us know how it was!