Sweet Potato Pommes Anna (Layered Potato Casserole)


This multicolored galette is a fun twist on the classic dish made with white potatoes. Don't worry if you only have one type of sweet potato, the result will still be beautiful. The bottom bakes to a potato-chip crisp with a caramelly sweetness, while the interior becomes melt-in-your-mouth rich.

Sweet Potato Pommes Anna (Layered Potato Casserole)
Prep Time:
35 mins
Additional Time:
55 mins
Total Time:
1 hrs 30 mins
8 wedges


  • 3 tablespoons unsalted butter, melted

  • 2 tablespoons extra-virgin olive oil

  • 12 ounces purple sweet potatoes, peeled

  • 12 ounces orange sweet potatoes, peeled

  • 12 ounces white sweet potatoes, peeled

  • 1 teaspoon chopped fresh thyme

  • 1 teaspoon salt

  • 1 teaspoon ground pepper


  1. Preheat oven to 400 degrees F.

  2. Combine butter and oil in a small dish. Liberally brush the bottom and sides of an 8-inch cast-iron skillet with some of the mixture.

  3. Using a mandoline, thinly slice sweet potatoes about 1/16 inch thick. Arrange one-fourth of the potatoes in concentric circles in the pan, overlapping the slices and alternating colors. Brush with some of the butter mixture and sprinkle with 1/4 teaspoon each thyme, salt and pepper. Repeat to make three more layers.

  4. Heat the pan over high heat until the sweet potatoes start sizzling, about 3 minutes. Cover the pan with foil and transfer to the oven. Bake for 30 minutes.

  5. Uncover and continue baking until the sweet potatoes in the center are easily pierced with a skewer and the bottom is golden brown and slightly crispy, 20 to 25 minutes more.

  6. Let cool for 10 minutes. Run a small sharp knife around the edge of the pan to loosen the potatoes, then invert the galette onto a serving plate. Cut into 8 wedges.


Equipment: 8-inch cast-iron skillet, mandoline

Nutrition Facts (per serving)

140 Calories
8g Fat
16g Carbs
2g Protein
Nutrition Facts
Servings Per Recipe 8
Calories 140
% Daily Value *
Total Carbohydrate 16g 6%
Dietary Fiber 3g 10%
Total Sugars 5g
Protein 2g 3%
Total Fat 8g 10%
Saturated Fat 3g 16%
Cholesterol 11mg 4%
Vitamin A 15056IU 301%
Vitamin C 15mg 17%
Folate 5mcg 1%
Sodium 319mg 14%
Calcium 33mg 3%
Iron 1mg 3%
Magnesium 22mg 5%
Potassium 374mg 8%

Nutrition information is calculated by a registered dietitian using an ingredient database but should be considered an estimate.

* Daily Values (DVs) are the recommended amounts of nutrients to consume each day. Percent Daily Value (%DV) found on nutrition labels tells you how much a serving of a particular food or recipe contributes to each of those total recommended amounts. Per the Food and Drug Administration (FDA), the daily value is based on a standard 2,000 calorie diet. Depending on your calorie needs or if you have a health condition, you may need more or less of particular nutrients. (For example, it’s recommended that people following a heart-healthy diet eat less sodium on a daily basis compared to those following a standard diet.)

(-) Information is not currently available for this nutrient. If you are following a special diet for medical reasons, be sure to consult with your primary care provider or a registered dietitian to better understand your personal nutrition needs.

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