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Overhead view of scalloped sweet potatoes in a baking dish with a serving removed

Scalloped Sweet Potatoes

These Scalloped Sweet Potatoes are made with layers of thinly sliced sweet potatoes coated in a creamy dairy-free sauce. This Sweet Potato Au Gratin is twist on the classic scalloped potatoes and makes the perfect holiday side dish! Vegan, gluten-free, grain-free with paleo and Whole30 options. 

Course Side Dish
Cuisine American
Keyword roasted sweet potatoes, scalloped sweet potatoes, sweet potao au gratin, vegan sweet potato recipes
Prep Time 15 minutes
Cook Time 40 minutes
Total Time 1 hour 55 minutes
Servings 10 servings
Calories 284 kcal
Author Kelly

Ingredients

  • 3 pounds sweet potatoes , about 4-5 medium evenly-sized potatoes, peeled and sliced thinly into ⅛ inch thick rounds (a mandolin works best)
  • 1 tablespoon avocado oil or olive oil
  • 1 small onion , diced
  • 4 cloves garlic minced
  • 1 cup coconut cream
  • 1 cup unsweetened almond milk
  • ¼ cup vegan butter , grass fed butter or ghee if not dairy-free
  • ½ teaspoon fine grain sea salt
  • ¼ teaspoon black pepper
  • ¼ cup vegetable broth
  • 2 Tbsp tapioca flour , or arrowroot flour
  • 1 Tbsp fresh thyme chopped , plus extra for garnishing
  • 1 Tbsp fresh rosemary chopped . plus extra for garnishing

Optional Topping: (leave out for Whole30)

  • 1/3 cup crushed grain-free cracker OR grain-free / gluten-free / regular breadcrumbs
  • 1/2 tablespoon melted vegan butter , or grass fed butter or ghee if not dairy-free

Optional:

  • 1/3 cup shredded vegan cheese (or regular) if not dairy-free, sub with nutritional yeast

Garnish:

  • extra fresh chopped herbs

Instructions

  1. Preheat the oven to 400°F. Lightly grease a 9x13 casserole dish / baking pan with avocado oil or coconut oil spray. Set aside.
  2. In a medium pot or saucepan over medium heat, heat the oil and add the onions and sauté for 3-4 minutes, until fragrant and slightly softened, stirring frequently.
    Diced onions being sauteed in a skillet
  3. Add garlic and sauté for 1 more minute until aromatic. Next, add the coconut cream, almond milk, butter, salt and pepper, and whisk until melted.

    In a separate small bowl or measuring cup, make a slurry by whisking together the vegetable broth and tapioca flour until there are no lumps. Pour the tapioca slurry into the pot and bring the mixture to a low boil, simmer for about 2 minutes or until mixture thickens. Stir in the rosemary and thyme, then remove the pot from the heat.

    Overhead view of cream sauce with herbs in a skillet with a whisk
  4. Spoon a thin layer of the sauce on the bottom of the prepared baking dish.

    Overhead view of cream sauce spread in a baking dish
  5. Arrange one layer of the sweet potato slices on top of the sauce covering the bottom of the baking, fanning them out so that they are slightly overlapped in a nice pattern. Spoon ⅓ of the cream sauce on top of the layer of sweet potatoes and gently use a spatula to spread the sauce to cover the sweet potatoes. Repeat this layering process until all of the sweet potatoes and sauce are gone.

    Sliced sweet potatoes in a baking dish
  6. Spoon ⅓ of the cream sauce on top of the layer of sweet potatoes and gently use a spatula to spread the sauce to cover the sweet potatoes. Repeat this layering process until all of the sweet potatoes and sauce are gone.

    Sliced sweet potatoes in a baking dish topped with cream sauce
  7. Cover the baking dish with aluminum foil and bake for 40-50 minutes, or until the sweet potatoes are cooked and fork tender.

    Meanwhile, stir together the breadcrumbs and melted butter. Once the potatoes are ready, remove the pan from the oven and top with breadcrumbs and cheese, if using. Return the pan back to the oven and bake for 10 minutes (or alternatively turn the oven to broil for 1-2 minutes - watching carefully to avoid burning), or until the topping is golden brown.

    Overhead view of scalloped sweet potatoes in a baking dish
  8. Remove from the oven and top with additional chopped rosemary and thyme on top if desired. Serve warm.
    Overhead view of scalloped sweet potatoes in a baking dish with a few squares removed

Recipe Notes

How to Store

Store leftover scalloped sweet potatoes in a well-covered, airtight container in the fridge. They will stay fresh for about 3-4 days.

How to reheat

You can reheat portions in the microwave or in a baking dish in the oven at 350F for 20 minutes, or until warm.

Nutrition Facts
Scalloped Sweet Potatoes
Amount Per Serving (1 serving)
Calories 284 Calories from Fat 135
% Daily Value*
Fat 15g23%
Carbohydrates 35g12%
Fiber 5g20%
Sugar 6g7%
Protein 4g8%
* Nutrition facts are provided as a courtesy using the WPRM recipe calculator. It is best to make your own calculations to ensure accuracy. We expressly disclaim any and all liability of any kind with respect to any act or omission wholly or in part in reliance on anything contained in this website. Percent Daily Values are based on a 2000 calorie diet.