Description
Indulge in the comforting layers of creamy mushroom and velvety potatoes with this delightful gratin. Perfect for family dinners or gatherings, it’s a dish that promises warmth and satisfaction in every bite.
Ingredients
Scale
- 2–2.5 lbs Russet or Yukon Gold potatoes
- 2 tablespoons olive oil
- 2 tablespoons unsalted butter
- 1 finely diced yellow onion
- 3–4 cloves minced garlic
- 1.5 lbs sliced mixed mushrooms (e.g., cremini, shiitake)
- 1 cup beef broth (or vegetable broth)
- 1 cup heavy cream
- 1 tablespoon fresh thyme or rosemary leaves (or 1 teaspoon dried)
- 1/2 cup warm heavy cream
- 1/4 cup warm whole milk
- 4 tablespoons unsalted butter
- Salt
- Freshly ground black pepper
- Pinch of freshly grated nutmeg
- 1.5 cups shredded Gruyère cheese (or your chosen cheese)
- Plain breadcrumbs (optional, for topping)
Instructions
- Prepare the 'Mud Potatoes': Peel the potatoes and cut them into 1-inch chunks. Place them in a large pot and cover with cold, salted water. Bring to a boil, then reduce heat and simmer until fork-tender, about 15-20 minutes.
- Drain the potatoes thoroughly and return them to the hot pot over low heat for a minute to evaporate excess moisture.
- Mash the potatoes until completely smooth. Stir in warm heavy cream, warm whole milk, and unsalted butter until fully incorporated. Season with salt, black pepper, and nutmeg. Cover and set aside.
- Create the Creamy Mushroom Filling: Heat olive oil and unsalted butter in a large skillet over medium-high heat. Add the diced onion and sauté until softened, about 5-7 minutes. Add minced garlic and cook for another minute.
- Add sliced mixed mushrooms and cook until they release their liquid and start to brown, about 8-12 minutes. Pour in beef broth and scrape up browned bits from the pan. Let it simmer until slightly reduced.
- Stir in heavy cream and fresh herbs, bringing to a gentle simmer. Cook until the sauce thickens slightly, seasoning generously with salt and black pepper. Remove from heat.
- Assemble the Gratin: Preheat the oven to 375°F (190°C) and grease a baking dish. Spread half of the 'mud potatoes' over the bottom of the dish.
- Spoon the creamy mushroom mixture over the potato layer, then top with the remaining 'mud potatoes'. Spread to cover completely.
- Sprinkle shredded cheese evenly over the top, adding breadcrumbs if desired.
- Bake for 30-35 minutes until bubbly and golden brown. Let it rest for 10-15 minutes before serving.
- Prep Time: 30 mins
- Cook Time: 40 mins
- Category: Side Dish
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 cup
- Calories: 450
- Sugar: 3 g
- Sodium: 600 mg
- Fat: 30 g
- Saturated Fat: 18 g
- Unsaturated Fat: 8 g
- Trans Fat: 0 g
- Carbohydrates: 35 g
- Fiber: 4 g
- Protein: 10 g
- Cholesterol: 80 mg
Keywords: For a lighter option, consider using half-and-half in the mushroom sauce. You can also substitute with dairy-free options like coconut milk or cashew cream. Ensure your broth is suitable for your dietary preferences.