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Creamy Porcini Mushroom & Gruyère Potato Gratin

A rich, creamy potato dish layered with porcini mushrooms, Gruyère cheese, and heavy cream, perfect for a comforting dinner.
Prep Time 15 minutes
Cook Time 50 minutes
Total Time 1 hour 5 minutes
Course Main Course, Side Dish
Cuisine French
Servings 4 servings
Calories 350 kcal

Ingredients
  

Main Ingredients

  • 2 cups porcini mushrooms (dried or fresh) Soak dried mushrooms in warm water if using.
  • 2 cups thinly sliced potatoes Slice evenly for uniform cooking.
  • 1 cup Gruyère cheese, grated Use good quality for best melting.
  • 1 cup heavy cream Pour evenly over the gratin before baking.
  • 2 tablespoons butter For sautéing garlic and mushrooms.
  • 2 cloves garlic, minced Sauté until fragrant.
  • Salt and pepper, to taste Adjust seasoning as needed.
  • Fresh herbs (like thyme or parsley) for garnish Brightens the rich flavors.

Instructions
 

Preparation

  • Preheat the oven to 375°F (190°C).
  • If using dried porcini mushrooms, soak them in warm water for about 30 minutes, then drain and chop.
  • In a skillet, melt the butter over medium heat and sauté the garlic until fragrant.
  • Add the porcini mushrooms and cook until they are tender.

Layering and Baking

  • In a baking dish, layer half of the sliced potatoes, followed by the mushroom mixture, half of the Gruyère cheese, and a sprinkle of salt and pepper.
  • Repeat with the remaining potatoes and finish with the rest of the cheese on top.
  • Pour the heavy cream evenly over the gratin.
  • Cover with foil and bake for about 30 minutes, then remove the foil and bake for an additional 15–20 minutes until the top is golden and bubbly.
  • Garnish with fresh herbs before serving.

Notes

Serve hot straight from the oven with a green salad or roasted meats. Cool the gratin to room temperature before storing; it keeps in the fridge for up to 3 days.
Keyword Comfort Food, Creamy Gratin, Mushroom Dish, Potato Gratin, Vegetarian Recipe