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Cheesy Root Vegetable Gratin

  • Author: Chef Emma
  • Total Time: 1 hour 5 minutes
  • Yield: 8 servings 1x
  • Diet: Vegetarian

Description

Cheesy Root Vegetable Gratin is a show-stopping side dish featuring layers of sweet potatoes, parsnips, and beets baked with cream, garlic, Parmesan, and Gruyère. With its vibrant colors, creamy texture, and cheesy topping, it’s perfect for holiday dinners or cozy gatherings.

Ingredients

Scale
  • 1 tablespoon unsalted butter, softened
  • 1–2 long sweet potatoes (about 2 inches thick), peeled
  • 3–4 large parsnips, peeled and trimmed
  • 3–5 small beets, peeled
  • 14 tablespoons heavy cream, divided (whole milk may be substituted)
  • 4 ounces grated Parmesan, divided
  • 1 tablespoon fresh minced thyme, divided (plus more for garnish)
  • 1 garlic clove, minced
  • 1 ounce shredded Gruyère
  • Salt and pepper, to taste

Instructions

  1. Preheat oven to 400°F and grease a 3-quart baking dish with butter.
  2. Using a mandoline or sharp knife, slice sweet potatoes, parsnips, and beets into thin rounds. Place each vegetable in a separate bowl.
  3. Pour 4 tablespoons cream over sweet potatoes and parsnips, and 2 tablespoons over beets. Add 1/2 ounce Parmesan and 1 teaspoon thyme to each bowl. Season with salt and pepper and toss to coat.
  4. Pour remaining 1/4 cup cream into the baking dish, sprinkle with 1/2 ounce Parmesan, and add minced garlic.
  5. Stack slices and arrange them upright in rows: sweet potatoes first, then parsnips, then beets. Repeat until dish is filled, creating 6 rows. Season with salt, pepper, and a sprinkle of Parmesan.
  6. Cover with foil and bake for 30 minutes until vegetables begin to soften.
  7. Remove foil, sprinkle Gruyère on top, and bake uncovered for 18–20 minutes until fork-tender and golden.
  8. Garnish with fresh thyme and serve warm.

Notes

For even cooking, use a mandoline to slice vegetables evenly. Assemble up to a day ahead for convenience, adding extra baking time if chilled. Beets may bleed into other layers if left overnight in cream, but flavor remains unaffected.

  • Prep Time: 15 minutes
  • Cook Time: 50 minutes
  • Category: Side Dish
  • Method: Baking
  • Cuisine: American

Nutrition

  • Serving Size: 1 serving
  • Calories: 265
  • Sugar: 7g
  • Sodium: 292mg
  • Fat: 17g
  • Saturated Fat: 10g
  • Unsaturated Fat: 0g
  • Trans Fat: 0g
  • Carbohydrates: 22g
  • Fiber: 5g
  • Protein: 9g
  • Cholesterol: 56mg

Keywords: root vegetable gratin, cheesy gratin, holiday side dish, sweet potato gratin, beet gratin

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Find it online: https://primetasty.com/cheesy-root-vegetable-gratin/