As the air turns crisp and the leaves transform into fiery shades of orange and gold, there’s nothing quite like a heartwarming dish to bring family and friends together. My Sweet Potato & Cranberry Gratin is a delightful blend of creamy sweet potatoes and tart cranberries, creating a festive centerpiece perfect for any gathering. The best part? This recipe is not only easy to whip up, but it’s also a versatile crowd-pleaser that fits beautifully into vegetarian, vegan, or gluten-free diets. Imagine serving a dish that’s not just comforting but also bursts with the flavors of the season—specifically designed for those of us eager to embrace homemade goodness over fast food. So, are you ready to elevate your holiday feast with this delightful gratin? Let’s dive in!

Why is this gratin so special?
Creamy Comfort: The Sweet Potato & Cranberry Gratin is a warm hug on a plate, blending creamy sweet potatoes with the delightful tartness of cranberries.
Festive Appeal: Its vibrant colors and rich flavors make it a standout dish ideal for holiday gatherings or family dinners.
Easy to Make: With straightforward steps, this recipe is perfect for busy individuals who still want to impress their guests.
Dietary Versatility: Whether you’re serving vegetarians, or you want to adapt it to be vegan or gluten-free, this recipe has you covered. Consider adding nuts for an extra crunch or pairing it with a crisp salad for a complete meal.
Crowd Favorite: Everyone will be asking for seconds, showcasing that homemade food truly outshines fast food every time!
Sweet Potato & Cranberry Gratin Ingredients
For the Gratin
- Sweet Potatoes – Provide natural sweetness and creamy texture; use firm, fresh sweet potatoes for the best results.
- Cranberries – Add tartness and vibrant color; substitute with frozen cranberries if fresh are unavailable; thaw and drain before use.
- Heavy Cream – Brings richness to the dish; for a vegan alternative, use coconut cream instead.
- Brown Sugar – Enhances sweetness and caramelizes beautifully during baking.
- Cinnamon – Adds warmth and spice; alternatively, nutmeg can be used for a different flavor.
- Salt and Pepper – Essential for seasoning; adjust quantities to taste based on your preferences.
- Gruyère Cheese – Provides a rich, melty topping; substitute with cheddar or mozzarella for variations in flavor.
- Breadcrumbs – Adds a delightful crunchy texture on top; choose gluten-free breadcrumbs for a gluten-free option.
Note: This Sweet Potato & Cranberry Gratin is a perfect way to bring comfort and festive cheer to your dining table!
Step‑by‑Step Instructions for Sweet Potato & Cranberry Gratin
Step 1: Preheat Oven
Begin your culinary journey by preheating your oven to 375°F (190°C). This temperature is ideal for achieving that perfectly golden and bubbly top on your Sweet Potato & Cranberry Gratin. While the oven preheats, it’s a great time to prepare your sweet potatoes, ensuring they’re ready to go.
Step 2: Prepare Sweet Potatoes
Peel the sweet potatoes and slice them evenly into approximately 1/4-inch rounds. In a large pot, bring salted water to a boil and add the sweet potato slices. Cook for 10-15 minutes, until they are just tender when pierced with a fork. Drain the sweet potatoes and let them cool slightly before layering them in your dish.
Step 3: Layer in Baking Dish
Grease a baking dish with cooking spray or a splash of oil to prevent sticking. Carefully arrange half of the boiled sweet potato slices in the dish, slightly overlapping for an even layer. This allows the flavors to meld beautifully as the Sweet Potato & Cranberry Gratin bakes, setting the stage for a delightful flavor experience.
Step 4: Add Cranberries
Sprinkle half of the fresh cranberries over the layer of sweet potatoes. The tartness of the cranberries will balance the sweetness of the potatoes beautifully. Make sure to distribute them evenly to ensure each bite is bursting with flavor, enhancing the overall festive appeal of your gratin.
Step 5: Mix Cream Mixture
In a mixing bowl, combine the heavy cream, brown sugar, cinnamon, salt, and pepper. Stir until the brown sugar is mostly dissolved to create a smooth mixture. Pour half of this creamy concoction over the sweet potatoes and cranberries, ensuring even coverage that will seep into the layers during baking.
Step 6: Repeat Layering
Place the remaining sweet potato slices on top of the first layer, creating another even layer. Next, sprinkle the remaining cranberries over the sweet potatoes. This second layer adds depth to your Sweet Potato & Cranberry Gratin, bringing a pop of color and flavor to the dish.
Step 7: Top with Cheese
Sprinkle a generous amount of shredded Gruyère cheese over the top of the final layer, followed by the breadcrumbs for that coveted crispy finish. The cheese should cover the surface well to help achieve a richly flavored, bubbling crust as your Sweet Potato & Cranberry Gratin bakes to perfection.
Step 8: Bake
Place the prepared baking dish into the preheated oven and bake for 30-35 minutes. Keep an eye on your gratin; it’s ready when the top is golden brown and bubbly, sending a delicious aroma wafting through your kitchen. This final stage is where the magic truly happens, transforming your ingredients into a stunning dish.
Step 9: Serve
Once baked to perfection, remove the Sweet Potato & Cranberry Gratin from the oven and let it cool for a few minutes. This resting time allows the flavors to meld beautifully and makes serving easier. Scoop generous portions onto plates and get ready to impress your family and friends with this comforting, festive dish.

How to Store and Freeze Sweet Potato & Cranberry Gratin
Fridge: Store leftovers in an airtight container in the fridge for up to 3 days. This will help preserve its delicious flavors and creamy texture.
Freezer: If you want to keep it longer, the Sweet Potato & Cranberry Gratin can be frozen for up to 3 months. Ensure it’s tightly wrapped in foil or plastic wrap before freezing.
Reheating: For the best results, reheat in the oven at 350°F (175°C) until warmed through. This will help restore its creamy consistency and crispy topping.
Make-Ahead: You can assemble the gratin a day in advance and refrigerate it until you’re ready to bake. Just cover the dish with foil or a lid to keep it fresh!
Make Ahead Options
These Sweet Potato & Cranberry Gratin dishes are absolutely perfect for meal prep! You can assemble the gratin up to 24 hours in advance; simply cover it tightly with plastic wrap and store it in the refrigerator. By preparing the layers ahead of time, you not only save precious moments on busy days but also allow the flavors to deepen overnight, enhancing the overall taste. When it’s time to bake, remove it from the fridge and let it sit for about 15-20 minutes at room temperature before popping it in the oven. This ensures it cooks evenly, resulting in that delightful, golden-brown crust that will impress your guests while you enjoy more quality time with loved ones!
What to Serve with Sweet Potato & Cranberry Gratin
As you gather around the table, consider these delightful pairings that will elevate your meal into a comforting feast.
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Roasted Brussel Sprouts: These caramelized veggies offer a nutty flavor and crispy texture that beautifully balance the creamy gratin.
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Maple-Glazed Carrots: Tender, sweet carrots drizzled with maple syrup bring a touch of sweetness and vibrant color to your holiday spread.
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Crisp Green Salad: A fresh salad with seasonal greens, nuts, and a light vinaigrette adds a refreshing crunch, contrasting delightfully with the gratin’s richness.
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Savory Herb Stuffing: This classic side dish brings earthy flavors and a satisfying, hearty component that will complement the sweetness of the sweet potatoes.
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Honey-Balsamic Glazed Chicken: For those looking to add protein, the savory, sweet glaze on the chicken works perfectly with the flavors of the gratin. It creates a lovely juxtaposition and rounds out the meal.
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Warm Apple Crisp: End your meal on a sweet note with this comforting dessert, filled with spiced apples and a crunchy oat topping, making it a testament to home-cooked goodness.
These pairings will not only enhance your Sweet Potato & Cranberry Gratin but will also create a memorable dining experience, showcasing the joy of home-cooked meals.
Expert Tips for Sweet Potato & Cranberry Gratin
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Fresh Ingredients: Use firm, fresh sweet potatoes and bright cranberries for the best flavor and presentation. Avoid soft potatoes, as they can lead to a mushy gratin.
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Layering Technique: Ensure even layering of sweet potatoes and cranberries to maximize flavor distribution. Skipping this step can result in uneven tastes throughout the gratin.
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Creamy Consistency: For a richer result, allow the cream mixture to sit for a few minutes before pouring it over the layers. This will help enhance the sweet potato & cranberry gratin’s texture.
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Cheese Options: If you’re looking for a lighter option, consider using less cheese or opt for a combination of cheeses to tailor the flavor to your liking.
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Crispy Topping: For an extra crispy finish, broil the gratin for a minute or two after baking. Keep a close eye to ensure it doesn’t burn!
Sweet Potato & Cranberry Gratin Variations
Feel free to get creative with this dish and make it your own, infusing it with flavors and textures that sing to your taste buds!
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Dairy-Free: Swap heavy cream for coconut cream to keep it rich and creamy while making it vegan. This adds a fantastic tropical note!
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Nutty Crunch: Add a handful of chopped pecans or walnuts to the layers for a delightful crunch. They add not just texture but also a nutty flavor that complements the sweet potatoes wonderfully.
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Herb Infusion: Mix in fresh herbs like thyme or rosemary for an aromatic twist. These herbs beautifully enhance the savory notes while balancing the sweetness perfectly.
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Spice It Up: A pinch of cayenne pepper can elevate the entire dish, adding a gentle kick that surprises and delights. It brings a warmth that pairs nicely with the sweetness of the sweet potatoes.
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Cheese Alternatives: Try feta cheese for a tangy flavor or omit the cheese entirely for a nutty, vegan gratin. Nutritional yeast also works well as a cheesy substitute!
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Flavor Layering: Add caramelized onions or leeks between the layers for an extra flavor boost. Their sweetness will meld perfectly with the dish, adding depth you won’t soon forget.
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Sweetness Tweaks: Replace some or all of the brown sugar with maple syrup for a more complex sweetness, enriching the dish with a hint of caramel flavor.
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Bountiful Veggies: Toss in some sautéed spinach or kale for added nutrition and vibrant color. They blend seamlessly into the gratin and make it even more delightful.
Enjoy exploring these variations, and don’t miss out on pairing this dish with my Cranberry Apple Potatoes or adding a sweet ending with Bake Cranberry Pecan. The possibilities are endless!

Sweet Potato & Cranberry Gratin Recipe FAQs
What type of sweet potatoes should I use?
I recommend using firm, fresh sweet potatoes to achieve the best texture and flavor in your Sweet Potato & Cranberry Gratin. Avoid soft or sprouted potatoes, as they can lead to a mushy dish. Look for smooth, unblemished skin and even coloring for the most delicious results.
How should I store leftovers?
Store any leftover Sweet Potato & Cranberry Gratin in an airtight container in the fridge for up to 3 days. Make sure to let it cool completely before sealing. This helps preserve the creamy texture and vibrant flavors. Just reheat in the oven at 350°F (175°C) for the best results!
Can I freeze the gratin?
Absolutely! You can freeze your Sweet Potato & Cranberry Gratin for up to 3 months. To do this, ensure it’s tightly wrapped in foil or plastic wrap, or use a freezer-safe container. When you’re ready to enjoy it again, simply thaw in the fridge overnight and reheat in the oven at 350°F (175°C) until heated through.
What should I do if my gratin is not bubbling or browning?
If your gratin doesn’t bubble or turn golden brown after baking, it may not have had enough time in the oven. Increase the baking time by 5-10 minutes but be sure to check periodically to prevent burning. For an extra crispy finish, you can broil it for a minute or two at the end—keeping a close eye on it to avoid over-browning.
Are there any dietary considerations for this recipe?
Yes! This Sweet Potato & Cranberry Gratin is fantastic for vegetarians and can easily be adapted for vegan or gluten-free diets. To make it vegan, simply swap the heavy cream for coconut cream and choose a dairy-free cheese alternative. For a gluten-free option, use gluten-free breadcrumbs on top. Enjoy experimenting with these substitutions without sacrificing flavor!
Can I make this gratin ahead of time?
Very! You can assemble the entire Sweet Potato & Cranberry Gratin a day in advance. Just cover it with foil or a lid and refrigerate until you’re ready to bake. This makes it a convenient option for busy holiday gatherings, allowing the flavors to meld beautifully overnight. Just remember to increase the baking time by a few minutes if going straight from the fridge to the oven.

Sweet Potato & Cranberry Gratin for a Cozy Holiday Feast
Ingredients
Equipment
Method
- Preheat your oven to 375°F (190°C).
- Peel and slice sweet potatoes into 1/4-inch rounds. Boil in salted water for 10-15 minutes until tender, then drain and cool slightly.
- Grease a baking dish and layer half of the sweet potato slices, slightly overlapping.
- Sprinkle half of the cranberries over the sweet potatoes evenly.
- In a mixing bowl, combine heavy cream, brown sugar, cinnamon, salt, and pepper. Pour half over the layers.
- Add the remaining sweet potato slices and then cranberries on top.
- Top with shredded Gruyère cheese and breadcrumbs.
- Bake for 30-35 minutes until golden brown and bubbly.
- Let cool for a few minutes, then serve.

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