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Sweet Potato Holiday Gratin

3-Ingredient Sweet Potato Holiday Gratin – Insanely Delicious


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  • Author: Mery Johnston
  • Total Time: 1 hour
  • Yield: 68 servings 1x
  • Diet: Vegetarian

Description

A creamy, cozy holiday side dish with sweet potatoes, cranberries, and cheese, perfect for Thanksgiving or Christmas.


Ingredients

Scale
  • 3 medium sweet potatoes, peeled and thinly sliced
  • 1 1/4 cups heavy cream
  • 1 cup shredded Gruyère cheese (or sharp white cheddar)
  • 1/2 cup dried cranberries
  • 2 cloves garlic, minced
  • 1 tsp fresh thyme leaves (or 1/2 tsp dried)
  • 1/2 tsp salt
  • 1/4 tsp black pepper
  • 1/2 cup panko breadcrumbs
  • 2 tbsp butter, melted
  • Fresh rosemary (for garnish)

Instructions

  1. Prep the Creamy Base: In a saucepan, combine heavy cream, garlic, thyme, salt, and pepper. Heat until just simmering.
  2. Layer the Good Stuff: In a greased baking dish, layer half the sweet potatoes, half the cranberries, and half the cheese. Repeat for a second layer.
  3. Pour & Bake: Pour the warm cream mixture over the layers. Cover with foil and bake at 375°F (190°C) for 30 minutes.
  4. Top & Finish: Uncover, sprinkle breadcrumbs and remaining cheese on top. Drizzle with melted butter and bake uncovered another 15–20 minutes, until golden brown.
  5. Garnish & Serve: Let it rest for 10 minutes. Garnish with fresh rosemary sprigs and serve warm.

Notes

  • Use a mandoline for even sweet potato slices.
  • Substitute Gruyère with sharp cheddar for a different flavor.
  • Let gratin rest before serving for better slicing.
  • Prep Time: 15 minutes
  • Cook Time: 45 minutes
  • Category: Side Dish
  • Method: Baked
  • Cuisine: American

Nutrition

  • Serving Size: 1 serving
  • Calories: 320
  • Sugar: 12g
  • Sodium: 250mg
  • Fat: 18g
  • Saturated Fat: 10g
  • Unsaturated Fat: 6g
  • Trans Fat: 0g
  • Carbohydrates: 32g
  • Fiber: 4g
  • Protein: 7g
  • Cholesterol: 50mg