Sweet Potato Gratin
If you’re looking for a cozy, crowd-pleasing dish that’s both elegant and comforting, sweet potato gratin is the answer. This creamy, golden-baked side dish combines the natural sweetness of sweet potatoes with the richness of cream, butter, and cheese for a meal that feels like pure comfort in every bite. Whether you’re cooking for Thanksgiving, a dinner party, or a weeknight treat, this recipe is sure to impress.
Why You’ll Love Sweet Potato Gratin
Unlike traditional potato gratin, sweet potato gratin has a natural sweetness that pairs beautifully with savory ingredients like garlic, thyme, and parmesan cheese. The thinly sliced sweet potatoes bake to tender perfection under a blanket of creamy sauce and a crisp, cheesy crust. It’s a wonderful balance of sweet and savory — and a stunning dish to bring to any table.
Bonus: It’s naturally gluten-free, and you can easily make it dairy-free or vegan with a few simple swaps.
Ingredients You’ll Need
To make the best sweet potato gratin, you’ll need just a handful of wholesome ingredients:
- sweet potatoes (peeled and thinly sliced)
- milk (or coconut cream for dairy-free)
- Parmesan cheese
- Spices: sea salt, black pepper, garlic powder
- Thyme: Fresh, adds great flavor to the sweet potatoes!
Step-by-Step Instructions
- Preheat your oven to 400 degrees.
- Peel and season potatoes. Peel potatoes and thinly slice. Add to a bowl and toss with spices and parmesan cheese.
- Layer the sweet potatoes: Arrange a layer of thinly sliced and seasoned sweet potatoes in a greased baking dish. Pour milk over the top and sprinkle with remaining cheese.
- Bake: Bake for 45 minutes. Potatoes will be golden, soft and crispy on the edges. Garnish with fresh thyme, if desired.
Sweet Potato Gratin
Equipment
- Measuring spoons
- Measuring cups
- 9×13 baking dish
- Mixing bowl
- Cutting board
- Knife
Ingredients
- 6 cups sweet potatoes ,(about 4 medium sized)
- 1 1/2 cups milk
- 1 1/2 cups parmesan cheese , shredded
- 1 1/2 teaspoons sea salt
- 1 teaspoon black pepper
- 1/4 teaspoon garlic powder
- 1 tablespoon thyme ,fresh
Instructions
- Preheat the oven to 400 degrees.
- Peel sweet potatoes. Thinly slice sweet potatoes into rounds. Slices should roughly be about 1/8th of an inch. Thin, but can easily be sliced whole without breaking.
- Place sliced sweet potatoes into a large bowl.
- Add sea salt, black pepper, garlic powder, thyme and 1/2 cup of parmesan cheese. Toss to mix ingredients evenly. Line potatoes with seasonings into a 9×13 inch baking dish, making rows up and down. Allow potatoes to be stacked, creating a ladder effect across the pan. Sprinkle any remaining spices from mixture over top.
- Evenly pour milk across potatoes.
- Top with remaining parmesan cheese.
- Place baking pan into the preheated oven. Allow potatoes to bake for 45 minutes. Potatoes will soak in the liquid as it cooks. After 45 minutes, potatoes will be fork tender, golden on top and parmesan cheese will be slightly crispy.
- Top with additional fresh thyme, if desired. And serve warm.
Serving Suggestions
This sweet potato gratin pairs beautifully with roasted chicken, turkey, or beef. For a vegetarian meal, serve it alongside a crisp green salad or sautéed vegetables. It also makes an excellent make-ahead side dish — just reheat in the oven before serving.
Storage and Reheating
If you have any leftovers, I recommend covering cooled potatoes with plastic wrap and storing in the refrigerator. Alternatively, you can place potatoes into an airtight container. To reheat, preheat oven to 400. Bake for about 20 minutes until warmed through, or microwave a portion for about 1 minutes.
Can I make this Sweet Potato Gratin in advance?
To prepare this recipe in advance, I recommend fully cooking and cooling the gratin. Once the gratin is cooled, cover baking pan with plastic wrap and store in the refrigerator. When ready to enjoy, preheat oven to 400 degrees. Bake for about 20 minutes, or until warmed through.
Tips for the Best Sweet Potato Gratin
- Use a mandoline slicer to get even, thin slices that cook perfectly.
- Add a hint of nutmeg to the milk for extra depth.
Why Sweet Potato Gratin Deserves a Spot on Your Table
This sweet potato gratin recipe is more than just a side dish — it’s a statement piece. With its creamy layers, rich flavor, and beautiful presentation, it’s the kind of dish that brings everyone back for seconds. Plus, it’s versatile enough to fit any occasion, from holiday feasts to simple family dinners.
