The other day, a friend raved about a dish that perfectly captured the essence of the holiday season—Sweet Potato & Cranberry Gratin. It struck me how this comforting casserole not only dazzles with vibrant colors but also melds creamy sweetness with a zing of tartness in the most delightful way. If you’re looking for a quick side dish that’ll wow your guests and make your kitchen smell like a cozy holiday gathering, then you’re in for a treat! With easy modifications to make it vegan or gluten-free, this gratin is a versatile crowd-pleaser that adds warmth and richness to any meal. Ready to elevate your dinner table? Let’s dive into this festive recipe and bring some cheer to your next gathering!

Why is this gratin a must-try?
Comforting, this Sweet Potato & Cranberry Gratin is the ultimate cozy dish that brings warmth to any holiday table. Colorful layers of sweet potatoes and tart cranberries create an eye-catching presentation that will have your guests intrigued. Quick prep means you can enjoy more time with loved ones instead of stuck in the kitchen. Customizable, it easily transforms to accommodate vegan or gluten-free diets, ensuring everyone can indulge. For those who love festive flavors, this gratin strikes the perfect balance and echoes the comforting vibes of Baked Cranberry Brie. Get ready to impress your guests; this dish is bound to be the star of the meal!
Sweet Potato & Cranberry Gratin Ingredients
For the Gratin
- Sweet Potatoes – Provide sweetness and structure. Substitution: Can use butternut squash for a slightly different flavor.
- Fresh Cranberries – Add tartness and color. Substitution: Frozen cranberries can be used; thaw and drain before use.
- Heavy Cream – Adds creaminess to the layers. Substitution: For a vegan option, use coconut cream or almond milk.
- Brown Sugar – Enhances sweetness and balances the tartness of cranberries.
- Cinnamon – Provides warmth and an aromatic quality. Note: Adjust to personal taste.
- Salt & Pepper – Essential for seasoning.
- Gruyère Cheese – Adds flavor and a creamy texture. Substitution: Cheddar or mozzarella can also be used.
- Breadcrumbs – Provides a crunchy topping. Substitution: Use crushed gluten-free crackers for a gluten-free option.
Step‑by‑Step Instructions for Sweet Potato & Cranberry Gratin
Step 1: Preheat the Oven
Begin by preheating your oven to 375°F (190°C). This ensures that your Sweet Potato & Cranberry Gratin cooks evenly and achieves that beautifully golden finish. Prepare your baking dish by greasing it lightly with butter or cooking spray, which will help the gratin release easily after baking.
Step 2: Prepare the Sweet Potatoes
Peel the sweet potatoes and slice them into thin rounds, about 1/4 inch thick. Bring a large pot of water to a boil and add the sweet potato slices. Cook them for 10-15 minutes until tender but not falling apart—check by piercing one with a fork. Drain them well and let them cool slightly before layering.
Step 3: Layer the First Sweet Potato Slices
Once your sweet potatoes are slightly cooled, layer half of them in the greased baking dish, overlapping slightly to create an even base. Make sure they cover the bottom of the dish well, creating a solid foundation for the Sweet Potato & Cranberry Gratin.
Step 4: Add the Cranberries
Sprinkle half of the fresh cranberries evenly over the first layer of sweet potatoes. Their tartness will wonderfully complement the sweetness of the sweet potatoes. The vivid colors of the cranberries will start to brighten the gratin and make it look festive.
Step 5: Combine the Cream Mixture
In a medium bowl, combine heavy cream, brown sugar, cinnamon, salt, and pepper. Whisk them together until fully blended and slightly frothy. Pour half of this creamy mixture over the layered sweet potatoes and cranberries, ensuring it seeps between the layers for maximum flavor.
Step 6: Repeat the Layers
Repeat the layering process with the remaining sweet potatoes, creating a second layer on top of the cranberries. Add the rest of the cranberries on top of this layer, followed by the second half of the cream mixture. This ensures that every bite of your Sweet Potato & Cranberry Gratin is packed with flavor.
Step 7: Add Cheese and Breadcrumbs
Sprinkle the top of the gratin generously with shredded Gruyère cheese, ensuring it covers the surface evenly. Next, add a layer of breadcrumbs for an irresistible crunchy topping. This combo will create a beautifully browned crust when it bakes, adding texture to the dish.
Step 8: Bake the Gratin
Place the assembled Sweet Potato & Cranberry Gratin in the preheated oven and bake for 30-35 minutes. Look for a golden brown crust and bubbling edges to indicate that it’s done. The kitchen will be filled with a delightful aroma that signals it’s almost time to enjoy!
Step 9: Cool Before Serving
Once the gratin is perfectly baked, remove it from the oven and let it cool for about 5-10 minutes before serving. This will allow the flavors to meld nicely, and you’ll serve a slice that holds its shape beautifully. Enjoy the warm, comforting goodness of the Sweet Potato & Cranberry Gratin with your loved ones!

Make Ahead Options
These Sweet Potato & Cranberry Gratin are perfect for busy home cooks looking to save time during the holiday rush! You can assemble the gratin up to 24 hours in advance; simply prepare all the layers and cover tightly with foil in the fridge. For best results, keep the cream mixture separate and pour it over just before baking to maintain the creamy texture. When you’re ready to serve, preheat the oven and bake the gratin for about 30-35 minutes until bubbly and golden. Not only does this meal prep strategy create a stress-free environment, but it also ensures that your Sweet Potato & Cranberry Gratin is just as delicious and festive when it’s time to gather around the table!
Expert Tips for Sweet Potato & Cranberry Gratin
-
Slice Evenly: Make sure to slice the sweet potatoes uniformly for even cooking and a pleasing presentation in your Sweet Potato & Cranberry Gratin.
-
Watch the Bake: Keep an eye during the last minutes of baking; broil for added crispiness but stay vigilant to prevent burning.
-
Layer Wisely: Layering is key! Place sweet potatoes and cranberries evenly in each layer, allowing the cream to soak in for enhanced flavor.
-
Cooling Time: Let the gratin cool for 5-10 minutes before serving; this helps it set nicely and makes serving easier.
-
Customize Flavors: Feel free to tweak spices and add-ins based on your taste; a pinch of nutmeg or a dash of maple syrup can elevate the flavors!
What to Serve with Sweet Potato & Cranberry Gratin
Imagine the comforting aroma of your holiday gathering, as you prepare a delightful spread to accompany your festive dish.
- Roasted Brussels Sprouts: Their earthy flavor and crispy texture balance the sweetness of the gratin and add a lovely green touch to the table.
- Herb-Crusted Chicken: Juicy, savory chicken pairs beautifully, creating a wholesome contrast to the creamy layers of sweet potatoes and cranberries.
- Garlic Mashed Potatoes: Rich and buttery, they provide a delightful creaminess that complements the texture of the gratin without overshadowing its unique flavor.
- Cranberry Sauce: A side of tart cranberry sauce enhances the dish, providing a bright, acidic counterpoint to the sweet, creamy elements. This pairing is especially festive and refreshing.
- Mixed Green Salad: A fresh salad with tangy vinaigrette adds vibrancy and crunch, balancing the rich flavors of the gratin. Toss in some nuts for an extra layer of texture.
- Spiced Apple Cider: Warm cider infused with spices like cinnamon and cloves creates a cozy beverage that matches the enchanting flavors of your meal.
- Pumpkin Pie: For dessert, enjoy a slice of creamy pumpkin pie; its spiced notes will resonate with the holiday spirit established by the gratin, delighting everyone after the feast.
How to Store and Freeze Sweet Potato & Cranberry Gratin
Fridge: Keep leftover Sweet Potato & Cranberry Gratin wrapped tightly in plastic wrap or transferred to an airtight container for up to 3 days.
Freezer: For longer storage, freeze the unbaked gratin (assembled but uncooked) in an airtight container for up to 2 months. When ready, bake straight from frozen, adding 10-15 minutes to the cooking time.
Reheating: Reheat cooked leftovers in the oven at 350°F (175°C) until warmed through, about 20-25 minutes. You can cover it with foil to prevent over-browning.
Make-Ahead Tip: Consider preparing this gratin a day in advance. Assemble the dish, refrigerate it, and bake just before serving to save time on busy occasions.
Sweet Potato & Cranberry Gratin Variations
Feel free to explore your culinary creativity with these delightful twists on this Sweet Potato & Cranberry Gratin!
-
Vegan Option: Replace heavy cream with coconut cream and use plant-based cheese for a wholesome vegan twist. The nuttiness of coconut adds a deliciously tropical flavor to this festive dish.
-
Gluten-Free Crunch: Use crushed gluten-free crackers instead of breadcrumbs to maintain that satisfying crunch while accommodating gluten sensitivities.
-
Cheese Swap: Swap Gruyère cheese for tangy feta for a zesty flavor twist that pairs wonderfully with the sweet and tart elements of the dish.
-
Nutty Boost: Add chopped walnuts or pecans between the layers for an extra crunch and a hearty texture that adds depth to each bite.
-
Maple Sweetness: Drizzle in a tablespoon of maple syrup into the cream mixture to boost the sweetness and add a warm, earthy undertone that complements the sweet potatoes beautifully.
-
Herb Infusion: Enhance the flavor profile by adding fresh herbs like thyme or rosemary in between layers for a fragrant aroma and a burst of freshness throughout the gratin.
-
Spicy Kick: For the heat lovers, a pinch of cayenne pepper can be added to the cream mixture. This slight kick contrasts perfectly with the sweetness, making every bite a burst of flavor.
-
Butternut Squash Twist: Substitute sweet potatoes for butternut squash for a different flavor profile while keeping all the cozy elements that make this dish so beloved.
Each of these variations invites you to create a unique version of this beloved dish, ensuring it can harmonize beautifully with other festive favorites like Baked Cranberry Brie. Dive in, mix it up, and make it your own!

Sweet Potato & Cranberry Gratin Recipe FAQs
What is the best way to select sweet potatoes for this recipe?
Absolutely! Look for firm, evenly shaped sweet potatoes without any dark spots or blemishes. The skin should be smooth and free of wrinkles. Fresh sweet potatoes will be heavy for their size, with no signs of sprouting. If you’re looking for alternatives, butternut squash can provide a slightly different, yet delicious flavor.
How should I store leftovers of the Sweet Potato & Cranberry Gratin?
Very simple! Keep any leftovers in an airtight container or wrap them tightly in plastic wrap. You can store it in the refrigerator for up to 3 days. When you’re ready to enjoy, just reheat in the oven at 350°F (175°C) for about 20-25 minutes or until heated through. You can cover it with foil to prevent the top from over-browning.
Can I freeze Sweet Potato & Cranberry Gratin?
Absolutely! For tasty meal prep, you can freeze the assembled, unbaked gratin for up to 2 months. Just make sure it’s in an airtight container to prevent freezer burn. When you’re ready to bake it, take it out of the freezer and cook straight from frozen. You’ll want to add an extra 10-15 minutes to the baking time, and it should be a delightful treat!
What if my sweet potatoes aren’t cooking evenly?
Oh, that can happen! The key is to ensure the sweet potatoes are sliced evenly—about 1/4 inch thick works like a charm. If they seem undercooked, you can partially boil or steam them a bit longer, checking with a fork for doneness, before layering. This way, you’ll avoid any hard bits after baking and achieve a creamy texture throughout the dish.
Are there any dietary considerations for this gratin?
Absolutely! This Sweet Potato & Cranberry Gratin can easily accommodate various diets. For a vegan option, simply swap heavy cream for coconut cream or almond milk, and choose plant-based cheese. As for gluten-free variations, using crushed gluten-free crackers instead of breadcrumbs will do the trick seamlessly. It’s always fun to adapt recipes so everyone can join in on the feast!

Sweet Potato & Cranberry Gratin: A Cozy Holiday Delight
Ingredients
Equipment
Method
- Preheat your oven to 375°F (190°C). Grease your baking dish lightly with butter or cooking spray.
- Peel the sweet potatoes and slice them into thin rounds, about 1/4 inch thick. Boil in a pot of water for 10-15 minutes until tender.
- Layer half of the sweet potato slices in the greased baking dish, overlapping slightly.
- Sprinkle half of the fresh cranberries over the first layer of sweet potatoes.
- In a bowl, combine heavy cream, brown sugar, cinnamon, salt, and pepper. Whisk until blended. Pour half over the layers.
- Repeat layering the remaining sweet potatoes and cranberries, then pour the rest of the cream mixture over.
- Top with shredded Gruyère cheese and breadcrumbs.
- Bake in the preheated oven for 30-35 minutes until golden brown and bubbling.
- Let cool for 5-10 minutes before serving.

Leave a Reply