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Potato Gratin

Creamy Potato Gratin

Potato Gratin combines French and Italian flavors in the most delicious, easy to make and comforting potato dish.

Course Appetizer, Main Course
Cuisine American, French, Italian
Keyword Potato Gratin
Prep Time 15 minutes
Cook Time 1 hour 30 minutes
Total Time 1 hour 45 minutes
Servings 8 servings
Calories 251 kcal
Author Catalina Castravet


  • 5 tablespoons unsalted butter
  • 1 medium onion finely chopped
  • 1/4 cup all-purpose flour
  • 1/2 teaspoon coarse salt
  • 1 teaspoon Italian Seasoning
  • 1/2 teaspoon black pepper
  • 4 cups whole milk
  • 2 1/2 cups mozzarella cheese shredded
  • 6 cups thinly sliced peeled potatoes about 5-6 medium potatoes


  1. Preheat oven to 375 degrees F.

  2. Grease a 9x13 inches deep baking dish and set aside.

  3. In a medium saucepan, melt butter over medium heat, add onion and cook until softened, about 6 minutes.
  4. Add flour, salt, pepper and Italian seasoning and cook, stirring frequently, until mixture is pale golden for about 5 minutes.
  5. Whisking constantly, pour in 2 cups of milk, cook for a few minutes and add the remaining 2 cups of milk, whisk until smooth. Cook mixture stirring constantly until it starts to boil.
  6. Reduce heat to low and simmer gently, stirring occasionally, until the sauce thickens and is very creamy, about 8 - 10 minutes. Taste and adjust for salt and pepper.
  7. Remove from heat and stir in 1 1/2 cup of shredded cheese until melted.

  8. Mix the potatoes with the béchamel sauce and transfer the mixture to the baking dish, top with the remaining 1 cup of mozzarella cheese and transfer the dish into the oven.
  9. Bake for 1 hour or 1 hour and 10 minutes until the potatoes are tender.
  10. Serve and enjoy!

Recipe Video

Nutrition Facts
Creamy Potato Gratin
Amount Per Serving
Calories 251 Calories from Fat 72
% Daily Value*
Fat 8g12%
Saturated Fat 5g31%
Cholesterol 30mg10%
Sodium 505mg22%
Potassium 781mg22%
Carbohydrates 27g9%
Fiber 4g17%
Sugar 7g8%
Protein 17g34%
Vitamin A 610IU12%
Vitamin C 16mg19%
Calcium 501mg50%
Iron 4.8mg27%
* Percent Daily Values are based on a 2000 calorie diet.