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Sweet Potato Gratin

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This Sweet Potato Gratin is creamy, flavourful and so delicious! A simple dish that is perfect for holiday dinners.

Ingredients

Units Scale
  • 2 lbs sweet potatoes, sliced thinly
  • 2 cups shredded old cheddar cheese
  • 1/4 cup shredded parmesan cheese
  • 2 tbsp olive oil
  • 3 shallots, minced
  • 3 cloves garlic, minced
  • 2 tbsp flour
  • 1/4 tsp salt
  • 1/4 tsp ground black pepper
  • 1/2 tsp paprika
  • 1 tbsp chopped fresh rosemary
  • dash ground cinnamon
  • 3 cups whole milk (or half and half)
  • 4 oz cream cheese

Instructions

  1. Preheat the oven to 325 degrees F.
  2. Prepare a 9×13 casserole dish by greasing the inside with butter or cooking spray (or see above for how I bake it in an enamel braiser).
  3. Shred the cheeses: cheddar and parmesan. Mix together, then separate into two: 3/4 cup goes into the sauce, 1 1/2 cups goes on top. Set aside for now.
  4. Peel and thinly slice the sweet potatoes, about 1/8 inch thick. Add to the prepared baking dish.
  5. In a skillet add about 2 tbsp olive oil, then over low-medium heat sauté the shallots and garlic until tender.
  6. Stir in the flour, cook for about 2 minutes.
  7. Add the salt, pepper, paprika, fresh rosemary and cinnamon. Sauté for about 2 minutes.
  8. Slowly whisk in the milk.
  9. Then add the cream cheese and 3/4 cup of shredded cheese and stir until melted. Don’t let the mixture boil.
  10. Pour the milk/cheese mixture over the potatoes, making sure to cover them well. Press any exposed sweet potatoes down into the cream sauce.
  11. Sprinkle on the remaining 1 1/2 cups of shredded cheese.
  12. Cover (with foil or an oven proof lid) and bake for 1 hour. 
  13. Then after this time, remove the cover and continue to bake for 30 minutes more, until the top is golden brown and bubbling and the sweet potatoes are tender.
  14. Let the dish stand for about 15 minutes before serving.