Air Fryer Layered Sweet Potato Gratin is a rich, comforting side dish made with thinly sliced sweet potatoes layered with creamy sauce, herbs, cheese, and savory seasonings. The air fryer creates beautifully tender potatoes with crisp golden edges while reducing cooking time compared to a traditional oven. This elegant gratin is perfect for holiday dinners, family gatherings, or cozy weeknight meals when you want something hearty and flavorful.
The natural sweetness of the sweet potatoes pairs beautifully with creamy cheese and aromatic herbs like thyme and rosemary. Each layer absorbs the rich garlic cream mixture, creating a soft, melt-in-your-mouth texture inside while the top becomes golden and slightly crisp. Parmesan and Gruyère cheeses add nutty depth and a delicious cheesy crust that makes every bite irresistible.
One of the best things about this recipe is its stunning presentation. The layered potato slices create a beautiful spiral effect that looks impressive yet is surprisingly easy to assemble. The air fryer helps caramelize the edges of the potatoes while keeping the center creamy and tender. It is a wonderful alternative to traditional potato gratin and adds vibrant color and flavor to any meal.
This sweet potato gratin pairs wonderfully with roasted chicken, turkey, steak, pork chops, or vegetarian mains. Whether served during the holidays or as a comforting side dish throughout the year, it brings warmth, richness, and elegant flavor to the table. Leftovers also reheat beautifully, making it an excellent make-ahead dish for busy schedules.
Ingredients
- 2 large sweet potatoes, peeled and thinly sliced
- 1 medium Yukon gold potato, thinly sliced
- 1 tablespoon olive oil
- 1 cup heavy cream
- 2 cloves garlic, minced
- 1 teaspoon fresh thyme leaves
- 1 teaspoon chopped rosemary
- ½ teaspoon salt
- ½ teaspoon black pepper
- ½ teaspoon paprika
- ¾ cup shredded Gruyère cheese
- ¼ cup grated Parmesan cheese
- Fresh herbs for garnish
Instructions
Step 1: Prepare the Potatoes
Peel the sweet potatoes and Yukon gold potato. Slice them very thinly using a sharp knife or mandoline for even cooking.
Step 2: Make the Cream Mixture
In a bowl, whisk together the heavy cream, minced garlic, thyme, rosemary, salt, black pepper, paprika, and olive oil.
Step 3: Layer the Gratin
Lightly grease a small round baking dish or cake pan that fits inside your air fryer basket.
Arrange the potato slices upright in alternating layers around the dish, slightly overlapping them in a spiral or layered pattern.
Pour the cream mixture evenly over the potatoes. Sprinkle Gruyère cheese and Parmesan cheese throughout the layers and over the top.
Step 4: Air Fry the Gratin
Preheat the air fryer to 350°F (175°C) for 3 minutes.
Place the dish into the air fryer basket and cook for 30–35 minutes until the potatoes are tender and the top is golden brown. If the top browns too quickly, loosely cover with foil during the final 10 minutes.
Step 5: Rest and Serve
Allow the gratin to rest for 5–10 minutes before serving so the creamy layers can set slightly.
Garnish with fresh thyme or rosemary before serving.
Nutritional Facts
(Approximate per serving — based on 6 servings)
- Calories: 260
- Protein: 7g
- Carbohydrates: 24g
- Fat: 16g
- Saturated Fat: 9g
- Cholesterol: 45mg
- Sodium: 320mg
- Fiber: 4g
- Sugar: 7g
Serving Suggestions
- Pair with roasted chicken, turkey, or steak
- Serve alongside green beans or a fresh salad
- Add crispy bacon bits for extra flavor
- Top with extra Parmesan before serving
