Also, check out our cajun potatoes, Hasselback potatoes for dinner.
Recipe card
Best sliced potato casserole
You only need heavy cream, grated cheese, and thinly sliced potatoes to make this gratin potato. It’s a total comfort food. This dish is worthy of being on any dinner table for special occasions like Thanksgiving, Christmas, or large parties. Serve it with roast pork loin, turkey, chicken, or beef tenderloin for a complete dinner. Au gratin is a delicious make-ahead side dish with potatoes. These gratin potatoes are also known as Dauphinoise potatoes.
Ingredients
Potatoes: Russet potatoes are the best choice for making gratin. But if unavailable, you can use Yukon gold. Heavy cream: Au gratin potatoes taste best when made with heavy cream. You will get a different result with milk or half and half. Seasoning: Season with salt, pepper, cayenne, garlic powder and onion powder. You can also add a pinch of nutmeg that enhances the flavor.
Step-by-step instructions
Preheat the oven to 350 degrees F. Grease a 9-inch by 9-inch pan using 1 tablespoon butter. In a bowl, add heavy cream, garlic powder, onion powder, black pepper powder, cayenne powder, and mix. Add a layer of thinly sliced potatoes, edges overlapping, into the greased baking pan. Top it with ⅓ portion of the cream mixture. Follow this with ⅓ portion of cheddar and parmesan cheese. Repeat the above process for two more layers. Finally, dot the top with the remaining 1 tablespoon of butter. Cover the pan with aluminum foil and bake this for 50 minutes covered. Remove the foil and bake uncovered for 10-15 minutes or until lightly browned and a knife pierces easily through the potatoes. Remove from the oven and rest it for 10 minutes. The best potatoes au gratin recipe is ready. Serve warm for your dinner, and enjoy.
Tips
See that the potatoes are covered in heavy cream so that gratin doesn’t dry out. Cover the baking dish with aluminum foil, which will help the potatoes remain soft and tender. Do you love more garlicky flavor? You can roast 4 to 5 garlic cloves and then add them to the cream sauce. You can also sautee the onions and mushrooms and add them between each layer. This will only enhance the taste of the dish. Store the leftover gratin in the refrigerator for 2-3 days. Reheat in the oven at 350 degrees F for 20 minutes or until heated through.
Make ahead instructions
If you are making this during the Thanksgiving and Christmas holidays or on a busy schedule, then the ingredients can be assembled in a baking dish and tightly wrapped. Store in the refrigerator overnight and bake just before you are ready to serve.
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