Sweet Potatoes Au Gratin Recipe is a delightful twist on the traditional scalloped potatoes, making it perfect for family gatherings or cozy dinners. This dish features layers of creamy sweet potatoes enveloped in a rich garlic and herb-infused sauce, topped with melted cheese. It’s an impressive side that complements various main dishes and adds a touch of elegance to any meal.
Why You’ll Love This Recipe
- Flavorful Combination: The blend of garlic, thyme, and creamy cheese creates a taste sensation that’s hard to resist.
- Simple Preparation: With straightforward steps, this recipe is easy to follow, making it suitable for cooks of all skill levels.
- Versatile Dish: Perfect for holidays, weeknight dinners, or potlucks; this dish fits all occasions.
- Crowd-Pleaser: The rich flavors and comforting texture will surely impress your family and friends.
- Nutrient-Rich: Sweet potatoes are packed with vitamins and minerals, making this dish not only delicious but also nutritious.
Tools and Preparation
Before diving into the recipe, gather your tools to ensure a smooth cooking experience.
Essential Tools and Equipment
- 9×13-inch baking dish
- Small bowl or pot
- Whisk
- Knife
- Cutting board
Importance of Each Tool
- 9×13-inch baking dish: This is essential for layering your sweet potatoes evenly and allows for even cooking.
- Whisk: A good whisk is key to blending the cream and cornstarch smoothly without lumps.
- Knife: A sharp knife makes slicing sweet potatoes easier and ensures uniform thickness for even cooking.

Ingredients
To create this sumptuous Sweet Potatoes Au Gratin Recipe, you will need the following ingredients:
For the Sweet Potatoes
- 3 pounds sweet potatoes
For the Cream Mixture
- 1 1/4 cup heavy cream
- 6 tablespoons butter
- 6 cloves garlic, (minced)
- 2 tablespoons fresh thyme, (chopped)
For Thickening and Topping
- 1 teaspoon cornstarch
- 1/3 cup Parmesan cheese
- Salt (and pepper)
How to Make Sweet Potatoes Au Gratin Recipe
Step 1: Preheat the Oven
Preheat the oven to 400 degrees F. While it’s heating up, remove the leaves from the thyme stems. Discard the stems and roughly chop the leaves.
Step 2: Prepare the Cream Mixture
In a small bowl or pot:
1. Combine heavy cream and cornstarch, whisking until smooth.
2. Add in butter, garlic, chopped thyme, 1 1/4 teaspoons of salt, and 1/2 teaspoon of pepper.
3. Heat over low on the stovetop or in the microwave until the butter melts, then whisk again to combine.
Step 3: Slice Sweet Potatoes
Peel each sweet potato one at a time:
– Slice them into very thin rounds about 1/8-inch thick.
– Arrange each slice in a 9×13-inch baking dish in a fanned-out pattern.
Step 4: Prevent Browning
Before peeling and slicing another sweet potato:
– Pour a little of the cream mixture over the potato slices already in the pan. This helps prevent browning while you work on additional slices.
Step 5: Layer All Sweet Potatoes
Continue slicing until all sweet potatoes are arranged beautifully in the baking dish:
– Pour any remaining cream mixture over the top of all layers.
Step 6: Bake
Bake in your preheated oven for 30 minutes. After this time:
– Sprinkle Parmesan cheese over all sweet potatoes.
– Bake for an additional 10 minutes until cheese is golden brown. Serve warm.
This Sweet Potatoes Au Gratin Recipe is sure to become a favorite in your household! Enjoy every cheesy bite!
How to Serve Sweet Potatoes Au Gratin Recipe
Sweet Potatoes Au Gratin is a versatile dish that can elevate any meal. Its creamy texture and rich flavors make it a delightful side or even a main attraction for special occasions. Here are some serving suggestions to enhance your dining experience.
Pair with Protein
- Roasted Chicken: Juicy roasted chicken complements the creamy sweetness of the gratin beautifully.
- Grilled Turkey: The smoky flavor of grilled turkey adds depth to the dish while keeping it light.
Add Fresh Greens
- Garlic Spinach: Sautéed garlic spinach offers a vibrant contrast, adding freshness and nutrition.
- Mixed Green Salad: A simple salad with vinaigrette balances the richness of the sweet potatoes and cleanses the palate.
Incorporate Seasonal Ingredients
- Cranberry Sauce: This tart sauce provides a delightful contrast to the sweetness of the potatoes, especially during holidays.
- Roasted Brussels Sprouts: Their nutty flavor pairs well with the creamy texture, making for a hearty combination.
How to Perfect Sweet Potatoes Au Gratin Recipe
To achieve the best results with your Sweet Potatoes Au Gratin, consider these helpful tips for perfecting this delicious dish.
- Use Fresh Ingredients: Fresh sweet potatoes and herbs will yield better flavor than processed varieties.
- Slice Evenly: Aim for 1/8-inch thick slices to ensure even cooking throughout the dish.
- Taste as You Go: Adjust seasoning to your preference during preparation for a more personalized flavor.
- Experiment with Cheeses: While Parmesan is classic, try adding Gruyère or cheddar for a different taste profile.
- Rest Before Serving: Allowing the dish to rest for 10 minutes after baking helps set its structure, making it easier to serve.
Best Side Dishes for Sweet Potatoes Au Gratin Recipe
Sweet Potatoes Au Gratin pairs wonderfully with various side dishes. Here are some excellent options to consider:
- Grilled Asparagus: Lightly seasoned asparagus adds crunch and brightness to your plate.
- Honey Glazed Carrots: Their natural sweetness complements the gratin while providing vibrant color.
- Quinoa Salad: A refreshing quinoa salad can add protein and texture, balancing out the creaminess.
- Sautéed Green Beans: Crisp green beans offer a nice contrast in texture and taste against the sweet potatoes.
- Cauliflower Mash: For a low-carb option, creamy cauliflower mash makes an excellent pairing without overshadowing the gratin’s flavors.
- Lentil Stew: A hearty lentil stew brings earthy flavors that can enhance the overall meal experience.
Common Mistakes to Avoid
Avoid these common mistakes to make sure your Sweet Potatoes Au Gratin Recipe turns out perfectly every time.
- Ignoring Potato Thickness: Slicing sweet potatoes too thick will result in uneven cooking. Aim for 1/8-inch slices for optimal texture.
- Rushing the Cream Mixture: Don’t skip the whisking step for the cream mixture. A well-combined mixture ensures even flavor distribution throughout the casserole.
- Overcrowding the Baking Dish: Filling the dish too full can lead to uneven cooking and sogginess. Arrange potatoes neatly and allow space for even heat circulation.
- Skipping Cheese: Omitting the cheese at the end may leave your gratin lacking that delicious golden crust. Always sprinkle Parmesan before the final baking phase.
- Not Allowing to Rest: Cutting into the dish immediately after baking can cause it to fall apart. Let it rest for a few minutes to set properly.
Refrigerator Storage
- Store in an airtight container for up to 3 days.
- Allow the dish to cool completely before sealing to prevent condensation.
Freezing Sweet Potatoes Au Gratin Recipe
- Freeze in a freezer-safe container or wrap tightly in plastic wrap and foil.
- It can be stored for up to 2 months without losing quality.
Reheating Sweet Potatoes Au Gratin Recipe
- Oven: Preheat to 350°F (175°C) and bake covered for about 20 minutes, then uncover until heated through.
- Microwave: Heat individual portions on medium power for 1-2 minutes, checking frequently.
- Stovetop: Warm over low heat in a skillet, adding a splash of cream if needed to maintain moisture.
Frequently Asked Questions
What is a Sweet Potatoes Au Gratin Recipe?
A Sweet Potatoes Au Gratin Recipe features thinly sliced sweet potatoes layered with a creamy garlic butter sauce and topped with cheese, baked until golden and bubbly.
Can I make this Sweet Potatoes Au Gratin Recipe ahead of time?
Yes! You can prepare it a day in advance. Just store it unbaked in the fridge and bake when you’re ready to serve.
Can I substitute other ingredients in this Sweet Potatoes Au Gratin Recipe?
Absolutely! You can use different cheeses or add herbs like rosemary for unique flavors. Consider swapping heavy cream with coconut milk for a dairy-free option.
How do I ensure my Sweet Potatoes Au Gratin comes out creamy?
Make sure to slice your sweet potatoes thinly and use plenty of cream in your mixture. Whisking well will help create that rich, creamy texture.
Final Thoughts
This Sweet Potatoes Au Gratin Recipe is not only delicious but also versatile. Feel free to customize it with your favorite herbs or cheeses. Whether as a side dish or a comforting main course, it’s sure to impress family and friends alike. Give it a try!
Sweet Potatoes Au Gratin
- Total Time: 55 minutes
- Yield: Approximately 8 servings 1x
Description
Indulge in the comforting flavors of Sweet Potatoes Au Gratin, a delightful twist on the classic scalloped potatoes. This rich and creamy dish features layers of tender sweet potatoes enveloped in a garlic-infused cream sauce, topped with golden melted cheese. Perfect for family gatherings or cozy dinners, it adds an elegant touch to any meal while delivering a nutrient-rich side that’s sure to impress.
Ingredients
- 3 pounds sweet potatoes
- 1 1/4 cup heavy cream
- 6 tablespoons butter
- 6 cloves garlic, minced
- 2 tablespoons fresh thyme, chopped
- 1 teaspoon cornstarch
- 1/3 cup Parmesan cheese
- Salt and pepper to taste
Instructions
- Preheat the oven to 400°F (200°C).
- In a small bowl, whisk together heavy cream and cornstarch until smooth. Stir in butter, garlic, thyme, salt, and pepper. Heat gently until the butter melts.
- Peel and slice sweet potatoes into thin rounds (about 1/8-inch thick). Layer slices in a greased 9×13-inch baking dish.
- Pour half of the cream mixture over the sweet potatoes to prevent browning.
- Continue layering and drizzle with remaining cream mixture.
- Bake for 30 minutes, then sprinkle with Parmesan cheese and bake for an additional 10 minutes until golden brown.
- Prep Time: 15 minutes
- Cook Time: 40 minutes
- Category: Side Dish
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 cup (200g)
- Calories: 320
- Sugar: 6g
- Sodium: 450mg
- Fat: 20g
- Saturated Fat: 12g
- Unsaturated Fat: 7g
- Trans Fat: 0g
- Carbohydrates: 32g
- Fiber: 4g
- Protein: 6g
- Cholesterol: 40mg