Cushioned Potato and Mushroom Gratin
Creamy potato layers with earthy mushrooms and a tender, melt-in-your-mouth texture from slow baking. This french-inspired vegetarian ready in about 90 minutes pairs russet potatoes, cremini mushrooms, heavy cream for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 380 calories and feeds 6, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.
Ingredients
- 1.25 lbs russet potatoes
- 8 oz cremini mushrooms
- 1 cup heavy cream
- 1/2 cup gruyere cheese
- 1 small shallot
- 2 tbsp unsalted butter
- 1 tbsp fresh parsley
Instructions
- Step 1: Preheat oven to 375°F (190°C). Thinly slice potatoes into 1/8-inch rounds, then soak in cold water for 10 minutes; drain and pat dry.
- Step 2: Sauté 1 finely minced shallot and 6 oz sliced mushrooms in 1 tbsp butter until golden, about 8 minutes. Remove from heat and mix with 1/2 cup heavy cream and 1 tbsp parsley.
- Step 3: Layer 1/3 of the potato slices in a greased 9x13-inch baking dish, season with salt and pepper. Pour half the mushroom mixture over, then repeat layers twice, ending with potatoes.
- Step 4: Pour remaining 1/2 cup cream over top, sprinkle with 1/4 cup grated cheese, and dot with remaining butter. Bake covered for 40 minutes, then uncovered for 20 minutes until potatoes are tender and top is golden.
Equipment for this recipe
Top-rated tools to make this recipe successfully.
Frequently asked questions
How long does Cushioned Potato and Mushroom Gratin take to make?
Total time is about 90 minutes (30 min prep + 60 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.
How do I store leftover Cushioned Potato and Mushroom Gratin?
Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep russet potatoes from drying out.
Can I substitute ingredients in Cushioned Potato and Mushroom Gratin?
Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.
How do I scale Cushioned Potato and Mushroom Gratin for a different number of people?
The recipe is written for 6 servings. Multiply each ingredient by (your serving target / 6). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.
What goes well with Cushioned Potato and Mushroom Gratin?
French vegetarian like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.
What others are saying
- ★★★★★
Loved it! So creamy and comforting. Made it for my family and they all asked for seconds—especially my picky-eater kid.
- ★★★★★
This gratin was a hit at my dinner party! The potatoes melted perfectly and the mushrooms added such a rich, earthy depth. Served it with roasted chicken for a cozy winter meal.
- ★★★★☆
Delicious base, but the mushrooms needed more garlic and thyme. Took 45 minutes to bake instead of the 30 listed, but still worth it.
