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vertical photo of Vegan Potatoes Au Gratin in white dish

Vegan Potatoes Au Gratin


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5 from 1 review

  • Author: Chris @ Sweet Simple Vegan
  • Total Time: 1 hour 20 minutes
  • Yield: 8-10 servings
  • Diet: Vegan

Description

These Vegan Potatoes Au Gratin need to be on your holiday tables this year! They’re perfectly creamy, cheesy, and guaranteed to please a crowd. Don’t be surprised if there aren’t any leftovers


Ingredients

  • 4 pounds Yukon gold potatoes
  • 1/4 cup (1/2 stick) vegan butter
  • 1 medium white onion, diced
  • 1 teaspoon salt
  • 8 cloves garlic, minced
  • 1 teaspoon fresh thyme, chopped
  • 1 teaspoon fresh rosemary, chopped
  • ¼ cup all-purpose flour
  • 2 cups oat milk
  • 1 cup vegan “chicken” broth (or vegetable broth)
  • ½ teaspoon black pepper
  • Pinch of nutmeg
  • 2 tablespoons nutritional yeast
  • ½ cup vegan parmesan
  • ¾ cup vegan mozzarella shreds
  • Chives, for topping

Instructions

  1. Using a mandolin (recommended) or sharp knife, slice the potatoes into ⅛” thick rounds. Submerge in a bowl of water and set aside.
  2. Butter a 9×13” baking dish and preheat the oven to 400ºF.
  3. Melt the vegan butter in a large skillet over medium heat. Add the diced onion and salt. Cook, occasionally stirring, until the onion is lightly browned, 5-6 minutes.
  4. Add the garlic, thyme, and rosemary, and cook another 1-2 minutes.
  5. Reduce to heat to medium-low and add the all-purpose flour. Cook for 1-2 minutes, stirring consistently. The mixture should form a thick paste.
  6. Slowly pour in the oat milk, whisking consistently.
  7. Once fully incorporated with no lumps, stir in the “chicken” broth. Then add the black pepper, nutmeg, nutritional yeast, and vegan parmesan.
  8. Simmer, occasionally stirring, until the parmesan is melted and the sauce coats the back of a spoon, resembling a gravy-like consistency.
  9. Remove from heat and taste, adding more salt or pepper as needed. Note that the sauce should be salty! It will be flavoring the potatoes.
  10. Drain the potato slices and layer 1/3 in your prepared baking dish.
  11. Add 1/3 of the cream sauce on top and spread it evenly with a spoon or spatula. Top with a sprinkle of salt, pepper, and vegan mozzarella cheese. Then layer the rest of the potatoes, followed by the rest of the cream sauce. Continue 2 more times until you use up all of the potatoes and cream sauce.
  12. Cover with aluminum foil and bake for 30 minutes. Remove the foil and bake for another 30 minutes, uncovered.
  13. Allow the potatoes to cool for 10-15 minutes before serving. Top with fresh chives, and enjoy!

Notes

  • This recipe works with peeled or unpeeled potatoes. Feel free to peel the potatoes before slicing them if you prefer!
  • After 60 minutes, the potatoes should be golden brown on top. If you prefer them darker, broil for 1-2 minutes.
  • Prep Time: 10 minutes
  • Cook Time: 70 minutes
  • Category: Side Dish
  • Method: Oven