Name: Cheesy Root Vegetable Gratin: Comfort Food for the Holidays
Prep time: 30 min
Cook time: 50 min
Total time: 80 min
Ingredients: 1 tablespoon Unsalted Butter (For greasing the baking dish.); 1-2 pieces Long Sweet Potatoes (Peeled and cut into 2-inch thick slices.); 3-4 pieces Large Parsnips (Trimmed and peeled.); 3-5 pieces Small Beets (Peeled.); 14 tablespoons Heavy Cream (Divided.); 4 ounces Parmesan Cheese (Divided.); 1 tablespoon Fresh Thyme (Divided, plus extra for garnish.); 1 clove Garlic (Minced.); 1 ounce Shredded Gruyère Cheese; Salt and Pepper (To taste.)

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As the crisp air of the holiday season settles in, there’s nothing quite as cozy as a bubbling dish of Cheesy Root Vegetable Gratin. This delightful recipe brings together a brilliant medley of sweet potatoes, parsnips, and beets, all harmoniously layered with creamy garlic and topped with melted gruyère cheese. What I love about this comforting holiday side dish is not just its stunning presentation, but also its versatility—it can be prepped ahead of time, making entertaining a breeze, while also being entirely vegetarian, satisfying everyone at the table. Beyond its crowd-pleasing qualities, the rich flavors and creamy textures will surely have your family and friends asking for seconds. Ready to bring a touch of warmth to your gathering? Let’s dive into creating this delicious gratin together!

Why is Cheesy Root Vegetable Gratin a Must-Try?

Comforting: This dish transforms humble root vegetables into an indulgent treat, the ultimate comfort food for chilly nights.
Visually Stunning: The vibrant layers of sweet potatoes, beets, and parsnips create a colorful centerpiece that dazzles at any holiday table.
Make-Ahead Friendly: Easily prepare this gratin in advance, allowing you more time to enjoy with loved ones. Check out our Italian Meatloaf Savor for another make-ahead dish that everyone will adore!
Rich and Creamy: With the perfect balance of creamy garlic and melty cheeses, each bite is a delightful explosion of flavor.
Versatile: Feel free to swap in different herbs or cheeses to suit your taste—experiment and make it your own! Ready to impress your guests? Let’s get cooking!

Cheesy Root Vegetable Gratin Ingredients

For the Gratin
• Unsalted Butter – Perfect for greasing the baking dish, ensuring a non-stick surface.
• Long Sweet Potatoes – About 1-2, peeled and cut into 2-inch thick slices; they add natural sweetness and structure to the dish.
• Large Parsnips – 3-4, trimmed and peeled; their nutty flavor beautifully complements the sweet potatoes.
• Small Beets – 3-5, peeled; these vibrant root vegetables bring earthy notes and a burst of color to your gratin.
• Heavy Cream – 14 tablespoons, divided; this creates that luscious creaminess that makes Cheesy Root Vegetable Gratin so irresistible.
• Parmesan Cheese – 4 ounces, divided; it enhances the flavor and provides a crispy topping to delight your taste buds.
• Fresh Thyme – 1 tablespoon, divided, plus extra for garnish; it adds aromatic earthiness to each layer of the dish.
• Garlic Clove – 1, minced; this ingredient offers a savory depth that beautifully intertwines with the cheese and cream.
• Shredded Gruyère Cheese – 1 ounce; the melty richness contributes to the gratin’s comforting, cheesy goodness.
• Salt and Pepper – To taste; essential for seasoning and bringing out all the flavors.

This Cheesy Root Vegetable Gratin promises to be a crowd-pleaser at your holiday gathering!

Step‑by‑Step Instructions for Cheesy Root Vegetable Gratin

Step 1: Preheat and Prepare
Begin by preheating your oven to 400°F (200°C). While it’s warming up, grease a 3-quart baking dish generously with softened unsalted butter to ensure the gratin doesn’t stick during baking. This step is crucial for easy serving later, ensuring each slice of your Cheesy Root Vegetable Gratin comes out beautifully.

Step 2: Slice the Vegetables
Wash and peel the sweet potatoes, parsnips, and beets, then slice them into thin rounds about 1/8 inch thick. A mandoline slicer can help you achieve uniform thickness for even cooking. Arrange your vibrant array of root vegetables—sweet potatoes, parsnips, and beets—on your countertop, ready to layer into the gratin.

Step 3: Coat Vegetables with Cream Mixture
In separate bowls, take each type of sliced vegetable and combine it with heavy cream, a sprinkle of salt, pepper, minced garlic, and a portion of Parmesan cheese. Toss them gently until evenly coated. This coating will enhance the flavor and texture of your Cheesy Root Vegetable Gratin, making each bite irresistibly creamy.

Step 4: Create the Base Layer
Pour 1/4 cup of the heavy cream into the bottom of the greased baking dish. Sprinkle a bit of the remaining Parmesan cheese over the cream, creating a flavorful layer that will infuse the gratin from the bottom up. This step creates a delicious base for the root vegetables, ensuring that their flavors meld beautifully as they bake.

Step 5: Arrange the Vegetables
Start layering the vegetables vertically in the baking dish, alternating between sweet potatoes, parsnips, and beets. Stand them upright in rows for a visually stunning effect. Make sure to pack them closely for a gorgeous presentation; this layering process is what makes your Cheesy Root Vegetable Gratin a true showstopper at the dining table.

Step 6: Season and Top
Once all the vegetables are arranged, season the top layer generously with salt and pepper. Then, sprinkle the remaining Parmesan cheese evenly over the vegetables. This will create a wonderful crispy topping as it bakes, adding an enticing golden brown crust to your Cheesy Root Vegetable Gratin.

Step 7: Bake Covered
Cover the baking dish tightly with aluminum foil and place it in the preheated oven. Bake for 30 minutes until the root vegetables start to soften and are fork-tender. This covered baking helps them steam, ensuring they cook evenly and absorb all the creaminess from the layers below.

Step 8: Add Gruyère and Bake Uncovered
After 30 minutes, carefully remove the foil and sprinkle the shredded Gruyère cheese evenly over the top of the gratin. Return it to the oven, uncovered, and bake for an additional 18-20 minutes, or until the top is golden brown and bubbly. The melted Gruyère adds a rich, decadent finish to your Cheesy Root Vegetable Gratin.

Make Ahead Options

These Cheesy Root Vegetable Gratin are perfect for busy home cooks looking to simplify meal planning! You can prep the entire dish up to 24 hours in advance by layering the vegetables and covering them with the cream mixture, ensuring you tightly wrap the baking dish to prevent any beet bleeding. To maintain their delicious quality, refrigerate until you’re ready to bake. When it’s time to serve, simply uncover and bake according to the instructions, adding the Gruyère cheese during the final stage to achieve that beautiful bubbling crust. This way, you’ll have a comforting, restaurant-quality side dish with minimal last-minute effort!

What to Serve with Cheesy Root Vegetable Gratin

The comforting warmth of this dish invites the perfect ensemble of flavors and textures to elevate your meal experience.

Crispy Brussels Sprouts: The bitterness of roasted Brussels sprouts nicely contrasts the rich creaminess of the gratin, creating a balanced plate. Toss them in olive oil and sea salt for a simple yet elegant side.
Garlic Bread: Crunchy garlic bread is a must-have for soaking up the luscious creaminess of your Cheesy Root Vegetable Gratin. It’s the perfect accompaniment to savor every last bite of your meal.
Mixed Green Salad: A fresh salad with crunchy greens and a zesty lemon vinaigrette adds brightness against the hearty gratin, refreshing the palate with each bite. Consider adding nuts or crumbled feta for an extra crunch.
Seared Garlic Mushrooms: Earthy seared mushrooms bring a depth of flavor that complements the sweetness of the root vegetables, enhancing the overall umami experience on your plate.
Honey-Glazed Carrots: Sweet, caramelized carrots provide a lovely contrast to the gratin’s richness while tying in with the dish’s root vegetable theme. Their vibrant color also makes your plate pop!
Sparkling Wine: Pairing your meal with a glass of crisp, sparkling wine adds a festive touch. The bubbles refresh and lighten the palate, making every bite delightful.
Pumpkin Pie: For dessert, consider the seasonal favorite of pumpkin pie—a luscious finish to your meal that echoes the sweet notes in the gratin. Warm spices across both dishes create a comforting holiday vibe.
Apple Crisp: Serve a warm apple crisp for dessert. Its crunchy topping and warm, sweet filling provide a satisfying end, echoing the cozy comfort of your main dish.

How to Store and Freeze Cheesy Root Vegetable Gratin

Fridge: Store any leftover Cheesy Root Vegetable Gratin in an airtight container for up to 3 days. Reheat in the oven or microwave until warmed through.

Freezer: For longer storage, freeze the gratin in a tightly sealed container for up to 2 months. Allow it to cool completely before freezing to avoid ice crystals.

Reheating: When ready to enjoy, thaw in the fridge overnight, then reheat in the oven at 350°F (175°C) until heated through and the top is crispy.

Preparing Ahead: You can make this dish a day in advance. Just refrigerate it tightly wrapped, which keeps the flavors intact and ready for baking.

Expert Tips for Cheesy Root Vegetable Gratin

Veggie Prep: Slice vegetables evenly for consistent cooking. Using a mandoline can save time and ensure uniform thickness, ensuring your Cheesy Root Vegetable Gratin bakes perfectly.
Prevent Beet Bleeding: Coat beets lightly with cream and place them in the bottom layer. This will prevent them from bleeding into the cream mixture and changing the dish’s beautiful colors.
Make Ahead: Prepare your gratin a day in advance. Just cover tightly in the refrigerator to keep the flavors fresh and prevent any beet bleeding.
Cheese Choices: Experiment with different cheeses like sharp cheddar or smoked gouda for unique flavors. Just make sure they melt well to maintain that creamy, dreamy texture.
Don’t Skip Seasoning: Always taste and adjust salt and pepper throughout. Proper seasoning elevates the gratin and brings out the rich flavors of the root vegetables.

Cheesy Root Vegetable Gratin Variations

Embrace your culinary creativity with these delightful twists on the classic gratin, allowing you to tailor each bite to your taste!

Carrot Swap: Substitute parsnips with carrots for a sweeter flavor. This bright orange variation adds a lovely hue and sweetness to your dish.
Herb Delight: Experiment with rosemary or sage instead of thyme to elevate the flavor profile. These aromatic herbs pair beautifully with the earthy root vegetables, giving your gratin a unique touch.
Spicy Kick: Add a pinch of red pepper flakes for a heat boost. This simple addition can take your Cheesy Root Vegetable Gratin to a whole new level of deliciousness!
Nutty Crunch: Top with crushed walnuts or hazelnuts before the final bake. This lends a delightful crunch and nutty flavor that beautifully complements the creamy layers.
Different Cheeses: Swap Gruyère or Parmesan for sharp cheddar or goat cheese for a unique cheesy twist! The variety in flavors can dramatically change your gratin experience.
Dairy-Free: Use almond or coconut milk along with dairy-free cheese for a plant-based version. It’s a great way to cater to vegan guests while still keeping the dish rich and comforting!
Vegan-Friendly: For a fully vegan gratin, substitute heavy cream with cashew cream and omit the cheese. This option is creamy and indulgent without any animal products.
Layered Elegance: Add a layer of spinach or kale between the vegetable layers for a pop of color and a nutrition boost. These greens offer a lovely contrast both visually and flavor-wise, making your dish even more inviting!

You’re on your way to impressing guests with these variations! If you’re looking for more inspiration, consider pairing this gratin with an inviting side dish like our Italian Meatloaf Savor. Happy cooking!

Cheesy Root Vegetable Gratin Recipe FAQs

How do I select the best root vegetables for the gratin?
Absolutely! Look for root vegetables that are firm and free of dark spots or blemishes. Sweet potatoes should feel heavy for their size, while beets and parsnips should have smooth, unblemished skin. Freshness matters as it significantly impacts the flavor of your Cheesy Root Vegetable Gratin, so choose vibrant veggies with good color.

How should I store leftover Cheesy Root Vegetable Gratin?
To keep your leftovers fresh, store them in an airtight container in the refrigerator for up to 3 days. When reheating, you can either warm them up in the oven at 350°F (175°C) to maintain a crispy top or in the microwave for quicker results. Make sure to cover the gratin to avoid drying it out during reheating!

Can I freeze Cheesy Root Vegetable Gratin?
Yes, you can freeze your gratin! First, allow it to cool completely. Then, transfer it to a tightly sealed container and freeze for up to 2 months. When you’re ready to enjoy it, thaw it in the refrigerator overnight. For reheating, place it in a preheated oven at 350°F (175°C) until heated through and the top is crispy—typically around 25-30 minutes.

What should I do if my gratin is too watery?
If your Cheesy Root Vegetable Gratin ends up being too watery, fear not! You can try these steps: First, remove it from the oven and let it sit for about 10-15 minutes; this allows excess liquid to settle. If that doesn’t work, you can transfer the gratin to a saucepan over medium heat. Stir gently until it thickens. Next time, ensuring your vegetables are sliced uniformly and not overcooked can help prevent excess moisture.

Is this Cheesy Root Vegetable Gratin suitable for vegetarians?
Very! This comforting dish is 100% vegetarian, making it a great choice for meatless meals. However, if you’re preparing it for someone with allergies, be sure to check for dairy intolerance, as it contains heavy cream and cheese. For lactose-free options, consider using lactose-free cheese or a plant-based cream alternative. Enjoy tailoring it to meet your guests’ needs!

Can I make Cheesy Root Vegetable Gratin ahead of time?
Certainly! To prepare ahead, assemble the gratin but don’t bake it immediately. Instead, cover it tightly with plastic wrap or foil and refrigerate for up to 24 hours. When you’re ready to serve, simply bake it directly from the fridge, adding 5-10 extra minutes to the baking time to ensure it’s heated through and bubbly. This way, you can focus on enjoying your gathering!