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+ servings

Potatoes Au Gratin

Course dinner, Side Dish
Cuisine American
Keyword potato au gratin
Prep Time 10 minutes
Cook Time 1 hour 20 minutes
Servings 8 people


  • 1 1/2 cups heavy cream you can use half-half cream too.
  • 3 garlic cloves minced
  • 2 tbsp unsalted butter melted
  • Salt and pepper to taste
  • 2 lb starchy potatoes peeled and sliced about 1/8” thick
  • 2 cups mozzarella shredded
  • 1 tsp thyme leaves chopped


  • Preheat the oven at 350F. Grease with butter or olive oil a rectangular baking dish (9 x 13).
  • In a medium glass bowl add heavy cream, garlic, butter, salt and black pepper. Mix all well until combined. Set aside.
    heavy cream and melted butter in a cup
  • Place sliced potatoes in three tight slanted rows as you can see in the photos and make sure the potato slices are slightly slanted. Pour the cream butter sauce evenly over the potatoes. Sprinkle more salt and pepper on top.
    overhead view of white casserole containing sliced potato and heavy cream
  • Cover them with foil, place it in the oven and bake for about 50 minutes.
    casserole wrapped with foil
  • After 45 minutes, remove the foil, top with mozzarella cheese and return to the oven again. Bake for 20 minutes more minutes or until potatoes are done, nice and golden brown on top.
    overhead view of white casserole containing sliced potato, milk and mozzarella cheese
  • Remove from the oven and garnish with fresh thyme. Enjoy!
    overhead view of potatoes au gratin in a casserole