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Creamy potato gratin baked golden brown in a casserole dish, with thinly sliced potatoes layered in a rich cream sauce, topped with melted cheese and fresh herbs.

Creamy Potato Gratin Recipe – Classic Comfort Food Side Dish Idea

This creamy potato gratin recipe is a rich and indulgent side dish made with thinly sliced potatoes layered in cream sauce and baked with melted cheese. Perfect for cozy family dinners, holiday gatherings, or a comforting addition to any meal.
Prep Time 20 minutes
Cook Time 1 hour
Total Time 1 hour 20 minutes
Course Comfort Food, Side Dish
Cuisine European, French
Servings 8
Calories 300 kcal

Equipment

  • Mandoline or sharp knife
  • Large saucepan
  • 9x13-inch baking dish
  • Foil
  • Wooden spoon

Ingredients
  

  • 2 lbs Yukon Gold or Russet potatoes, peeled and thinly sliced
  • 2 cups heavy cream
  • 1 cup Gruyère cheese, shredded
  • ½ cup Parmesan cheese, grated
  • 2 cloves garlic, minced
  • 1 tsp fresh thyme (or ½ tsp dried)
  • Salt and black pepper to taste
  • 2 tbsp butter (for greasing dish)

Instructions
 

  • Prep Potatoes: Peel and slice potatoes evenly (use a mandoline if possible).
  • Make Cream Mixture: In a saucepan, warm cream with garlic, thyme, salt, and pepper.
  • Layer Potatoes: Grease baking dish with butter. Arrange a layer of potatoes, pour cream mixture, sprinkle cheese. Repeat until all ingredients are used.
  • Bake: Cover with foil and bake at 350°F (175°C) for 45 minutes. Remove foil and bake an additional 15–20 minutes until golden and bubbly.
  • Rest & Serve: Let gratin rest for 10 minutes before slicing. Garnish with extra thyme or parsley.

Notes

  • Potato Choice: Use starchy potatoes for best texture.
  • Even Slices: Ensures consistent cooking.
  • Cheese Options: Gruyère for nutty flavor, cheddar for sharpness.
  • Make Ahead: Assemble in advance, refrigerate, and bake before serving.
  • Storage: Refrigerate leftovers up to 3 days; reheat gently.
 
Keyword Creamy Potatoes, French comfort food, Holiday side dish, Potato gratin