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Bubbling hot purple sweet potatoes gratin in ceramic baking dish with golden cheese crust

Coconut Cream Purple Sweet Potatoes Gratin

By Callie's Recipes
Transform ordinary purple sweet potatoes gratin into an extraordinary culinary masterpiece with this vibrant and luxurious touch of coconut cream!
Prep Time 25 minutes
Cook Time 45 minutes
Total Time 1 hour 10 minutes
Course Dinner
Cuisine Asian, French
Servings 8
Calories 285 kcal

Equipment

  • Mandoline slicer
  • 9x13 inch baking dish
  • Heavy-bottom saucepan
  • Box grater
  • Sharp chef's knife

Ingredients
  

  • 3 lbs purple sweet potatoes, peeled and sliced
  • 1/8-inch thick2 cups full-fat coconut cream
  • 1 cup whole milk
  • 3 garlic cloves, minced
  • 2 shallots, finely diced
  • 1 tbsp fresh thyme leaves
  • 1 tsp fresh rosemary, chopped1
  • ½ cups Gruyère cheese, grated
  • ½ cup Parmesan cheese, freshly grated
  • 2 tbsp butter
  • 1 tsp nutmeg, freshly grated
  • Salt and white pepper to taste

Instructions
 

  • Preheat oven to 375°F (190°C).
  • Wash and peel the purple sweet potatoes. Using a mandoline, slice them into uniform 1/8-inch thick rounds.
  • In a saucepan, combine coconut cream, milk, garlic, and shallots. Bring to a gentle simmer.
  • Add thyme, rosemary, nutmeg, salt, and white pepper. Simmer for 5 minutes.
  • Butter your baking dish. Layer purple sweet potato slices, slightly overlapping.
  • Pour one-third of the cream mixture over the potatoes and sprinkle with one-third of the cheese mixture.
  • Repeat layering twice more, ending with cheese on top.
  • Cover with foil and bake for 30 minutes.
  • Remove foil and bake for an additional 15 minutes until golden brown and bubbly.
  • Let rest for 10 minutes before serving.

Notes

  • Make ahead: Assemble up to 24 hours in advance, cover, and refrigerate.
  • Storage: Keep leftovers in an airtight container for up to 4 days.
  • Freezing: Can be frozen for up to 3 months. Thaw overnight in refrigerator.
Keyword Gluten-free option available, Vegetarian