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Creamy Potato Mushroom Gratin

A cozy and comforting dish made with layers of creamy potatoes and sautéed mushrooms, topped with cheese and baked to perfection.
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Prep Time 20 minutes
Cook Time 1 hour
Total Time 1 hour 20 minutes
Servings: 6 servings
Course: Dinner, Main Course
Cuisine: American, Comfort Food
Calories: 450
Ingredients Method Notes

Ingredients
  

Main Ingredients
  • 2 lbs potatoes Russets are preferred but any variety works.
  • 8 oz mushrooms Button or cremini are perfect.
  • 2 cups heavy cream For maximum creaminess.
  • 1 cup shredded cheese Cheddar, Gruyère, or your favorite cheese.
  • 2 tbsp butter For sautéing the mushrooms.
  • 2 cloves garlic Minced.
  • Salt and pepper To taste.
  • Fresh thyme Optional, for garnish.

Method
 

Preparation
  1. Preheat your oven to 375°F (190°C).
  2. Peel and slice the potatoes thinly (about 1/8-inch thick). A mandolin slicer can be useful.
Sautéing Mushrooms
  1. In a large skillet, melt the butter over medium heat.
  2. Add the minced garlic and cook until fragrant, about 1 minute.
  3. Toss in the sliced mushrooms, seasoning them with salt and pepper, and sauté until golden and moisture is released, about 5 to 7 minutes.
Layering the Gratin
  1. In a greased baking dish, place a layer of sliced potatoes followed by half of the sautéed mushrooms.
  2. Sprinkle a bit of cheese on top. Repeat these layers until all ingredients are used, finishing with a top layer of potatoes.
Baking
  1. Pour heavy cream over the layered potatoes and mushrooms, ensuring everything is covered.
  2. Sprinkle thyme on top if desired, cover with aluminum foil, and bake for 45 minutes.
  3. Remove the foil, sprinkle the remaining cheese on top, and bake for an additional 15 minutes until bubbly and golden brown.
Finishing Touches
  1. Let the gratin rest for about 10 minutes before serving.

Notes

For added crunch, sprinkle breadcrumbs on top before the final baking step. Substitute heavy cream with half-and-half or dairy-free milk if desired. This dish is great for family gatherings and leftovers can be stored in an airtight container for up to 3 days.