Cheesy Root Vegetable Gratin

Warm, rich, and bubbling with cheesy goodness, this Cheesy Root Vegetable Gratin | Spoon Fork Bacon is the perfect comfort dish that celebrates seasonal vegetables in the most indulgent way. Whether served alongside a holiday roast or enjoyed as a main for a meatless dinner, this gratin delivers on texture, depth, and satisfaction in every bite.

 Ingredients

This creamy, cheesy root vegetable gratin features a blend of hearty root veggies and a luscious cheese sauce. Here’s what you’ll need:

For the Root Vegetables:

• 1 large sweet potato, peeled and thinly sliced

• 2 medium Yukon gold potatoes, peeled and thinly sliced

• 2 medium parsnips, peeled and thinly sliced

• 2 medium carrots, peeled and thinly sliced

• 1 small rutabaga or turnip, peeled and thinly sliced

• Salt and black pepper to taste

For the Cheese Sauce:

• 2 tablespoons unsalted butter

• 2 tablespoons all-purpose flour

• 1½ cups whole milk

• ½ cup heavy cream

• 1 garlic clove, minced

• 1 teaspoon fresh thyme leaves (or ½ tsp dried thyme)

• 1 teaspoon Dijon mustard

• ½ teaspoon ground nutmeg

• 1 cup shredded Gruyère cheese

• ½ cup shredded sharp white cheddar

• ¼ cup grated Parmesan cheese

Topping (optional):

• ¼ cup panko breadcrumbs

• 2 tablespoons melted butter

• 1 tablespoon chopped parsley for garnish

Required Kitchen Tools

To prepare the Cheesy Root Vegetable Gratin | Spoon Fork Bacon at home, you’ll need the following kitchen equipment:

• Mandoline slicer or sharp chef’s knife

• Large mixing bowl

• Medium saucepan

• Whisk

• Oven-safe 9×13-inch baking dish or large gratin dish

• Measuring cups and spoons

• Aluminum foil

• Oven mitts

Step-by-Step Preparation Instructions

Step 1: Prep the Vegetables

Using a mandoline slicer or a very sharp knife, thinly slice all the root vegetables to approximately 1/8-inch thickness. Place the sliced veggies in a large bowl, season lightly with salt and pepper, and toss gently.

Step 2: Make the Cheese Sauce

In a medium saucepan over medium heat, melt the butter. Add the minced garlic and cook until fragrant (about 1 minute). Stir in the flour and whisk constantly for 1–2 minutes to make a light roux.

Slowly pour in the milk and cream, whisking continuously until the mixture is smooth and thickened (5–6 minutes). Reduce the heat and stir in thyme, mustard, nutmeg, and a pinch of salt and pepper.

Add the Gruyère, cheddar, and half the Parmesan cheese, stirring until melted and smooth. Remove from heat.

Step 3: Assemble the Gratin

Preheat your oven to 375°F (190°C). Lightly grease your baking dish. Layer the sliced vegetables in the dish, overlapping slightly like shingles and alternating colors/textures for visual appeal.

Pour the cheese sauce evenly over the layered vegetables, allowing it to seep between layers.

Step 4: Add Topping and Bake

Mix panko breadcrumbs with melted butter and sprinkle over the top, followed by the remaining Parmesan (if using). Cover the dish loosely with foil and bake for 40 minutes.

Remove foil and bake for another 20–25 minutes until the top is golden brown and the vegetables are fork-tender.

Step 5: Rest and Garnish

Let the gratin rest for 10–15 minutes before serving. This allows the sauce to thicken slightly and the flavors to settle. Sprinkle chopped parsley on top for a fresh finish.

Helpful Tips for the Best Cheesy Root Vegetable Gratin

• Use a mandoline for even slices: This ensures even cooking and a beautiful layered look.

• Choose flavorful cheese: Gruyère adds a nutty richness, while sharp cheddar delivers a bold, classic flavor. Feel free to swap in Fontina or Havarti.

• Add more herbs: Fresh rosemary or sage can be added to the cheese sauce or sprinkled between layers for added depth.

• Make it ahead: Assemble the gratin (without baking) a day ahead and store it in the refrigerator. Bring to room temperature before baking.

• Vegan adaptation: Use plant-based butter, unsweetened almond milk, and vegan cheese alternatives for a dairy-free version.

• Individual servings: Bake in ramekins or mini cast iron pans for elegant single-serve portions.

Approximate Nutritional Information (Per Serving – based on 8 servings)

• Calories: 320

• Protein: 9g

• Carbohydrates: 26g

• Fat: 20g

• Saturated Fat: 12g

• Fiber: 4g

• Sugar: 5g

• Sodium: 300mg

Note: Values are estimates and may vary depending on specific ingredients used.

Conclusion: A Must-Make Comfort Dish

This Cheesy Root Vegetable Gratin | Spoon Fork Bacon recipe is the ultimate comfort side dish that delivers on all fronts—creamy, crispy, cheesy, and deeply satisfying. The natural sweetness of root vegetables balances beautifully with the savory richness of the sauce, making it a showstopper for any meal.