Au Gratin Potato Casserole
Creamy and savory, this Au Gratin Potato Casserole features tender layered potatoes in a rich mushroom and cheese sauce, topped with crispy French fried onions. Perfect for family dinners or potlucks, it offers comforting flavors with a crispy topping and gooey cheese for a satisfying side or main dish.
Ingredients
Instructions
- Cook the sliced potatoes until partly done.
- Combine the cream of mushroom soup, milk, and grated sharp cheese.
- Layer the potatoes and soup mixture in a buttered baking dish, adding salt and pepper to taste, alternating layers.
- Bake at 350°F (175°C) for 25 minutes.
- Remove from oven and add partially crumbled French fried onions on top.
- Bake for an additional 10 minutes until golden and bubbly.
Tips & Substitutions
For a creamier texture, consider adding sour cream or cream cheese to the soup mixture. If you prefer a lighter option, use low-fat milk or a plant-based milk alternative. You can also swap out sharp cheese for a milder cheese like Monterey Jack or even a blend of cheeses for added flavor. Ensure the potatoes are sliced evenly for consistent cooking.
Serving Suggestions
This casserole is a perfect side dish for roasted meats or grilled vegetables, and it pairs beautifully with Western Fettuccini for a hearty meal. Serve it alongside a fresh salad or some steamed green beans to balance out the richness. For an elevated presentation, garnish with fresh herbs like parsley or chives before serving.
Storage & Reheating
Leftover Au Gratin Potato Casserole can be stored in an airtight container in the refrigerator for up to 3 days. To reheat, place in an oven preheated to 350°F (175°C) until warmed through, about 15-20 minutes. Cover with foil to prevent over-browning. It can also be reheated in the microwave, but the texture may differ.
Nutrition & Diet Analysis (per serving)
Each serving of Au Gratin Potato Casserole contains roughly 1216 calories, with 22g protein, 165g carbohydrates, and 52g fat. It is an excellent source of potassium (64% of the Daily Value), vitamin C (57% of the Daily Value), and protein (44% of the Daily Value). Note that it is relatively high in sodium, at 764mg per serving (33% of the Daily Value).
Estimated from ingredients & per-serving nutrition — verify against package labels for allergies or strict diets.
* % Daily Values based on a 2,000 calorie diet (FDA 2020).
Frequently Asked Questions
Can I use other types of potatoes for this recipe?
Yes, while russet or Yukon gold potatoes are preferred for their creaminess, you can use red potatoes or even sweet potatoes for a unique twist. Just keep in mind that cooking times may vary slightly depending on the type of potato you choose.
Is it possible to make this dish ahead of time?
Absolutely! You can prepare the casserole up to the baking step, cover it tightly, and refrigerate it for up to 24 hours. When ready to bake, add an extra 10-15 minutes to the baking time, as it will need to heat through completely.
Can I make this dish vegetarian?
Yes, this recipe is already vegetarian-friendly. To enhance the flavor, consider adding sautéed mushrooms or spinach to the layers. Additionally, ensure that the cream of mushroom soup you use is free from any meat-based ingredients.
Nutrition is estimated from USDA FoodData Central ingredient data and may vary with brand, portion and preparation — see our methodology. This information is for general educational purposes only and is not medical or dietary advice (disclaimer).