A rich and creamy gratin made with layers of potatoes, mushrooms, and Gruyère cheese, perfect for a comforting side dish.
Ingredients
Main Ingredients
- 2tbspSalted Butter
- 4 1/2cupsCremini Mushrooms, thinly sliced
- 3cloveGarlic, minced
- 1cupHeavy Cream
- 1cupSour Cream
- 1tspKosher Salt
- 1pinchGround Nutmeg
- 1/3cupMilk
- 2tbspAll-Purpose Flour
- 2 1/2lbRusset Potatoes, peeled and thinly sliced
- 1 1/2cupsGruyère Cheese, shredded
- Ground Black Pepper, as needed
- Fresh Parsley, to taste
How to make Creamy Mushroom and Potato Gratin
Preparation
Preheat oven to 375 degrees F (190 degrees C) and butter a large 3-quart casserole dish.
Cooking Mushrooms
Melt butter in a large skillet over medium-high heat until starting to foam.
Add mushrooms and cook until lightly browned and the moisture has evaporated.
Add garlic and continue to cook, stirring often for 1-2 minutes. Set aside.
Preparing Cream Mixture
Whisk together heavy cream, sour cream, kosher salt, ground black pepper, and ground nutmeg.
In a separate bowl, whisk together milk and flour until smooth. Add to the sour cream and heavy cream mixture and whisk until incorporated.
Assembling Gratin
Spread half of the potato slices evenly on the bottom of the prepared casserole dish.
Scatter half of the sautéed mushrooms and half of the Gruyère cheese evenly over the potatoes.
Repeat with remaining potatoes, mushrooms, and cheese.
Pour the cream mixture evenly over the potatoes. Give the pan a gentle shake to help flatten everything out.
Baking
Cover and bake for 45-60 minutes, checking at 45 minutes. The potatoes should be almost tender in the center.
Remove the cover and bake for an additional 20 minutes until the top is golden.
Serving
Remove from oven and allow to rest for 10 minutes before serving.
Garnish with fresh parsley if desired.
Tips & Tricks
For a more intense flavor, use a mix of cremini and white mushrooms.
Ensure the potatoes are sliced evenly for consistent cooking.
Reviews
manu45
Saramin
(@678sarin)
My name is Saramin is a culinary enthusiast with a flair for transforming everyday ingredients into delightful, flavour-packed dishes. Passionate about home cooking, Sarin specializes...