This dish is the ultimate comfort food for dinner. It is creamy, cheesy, and very satisfying to eat.

Many people serve this during big holiday meals. Learning how to make Classic Scalloped Potatoes Au Gratin Recipe is simple.

You just need to layer the sliced potatoes thinly. This recipe creates a golden and bubbly crust on top.

Your whole family will enjoy this warm side dish tonight. Let’s start making this Classic Scalloped Potatoes Au Gratin Recipe.

What Makes This Recipe Special

This recipe is special because of its rich texture. It uses a blend of cream and melted cheese.

The flavor is very savory with a hint of garlic. It is an easy dish to prepare in one pan. You can feed a large crowd with very little effort.

The edges get crispy while the middle stays soft. It makes a basic potato feel like a fancy meal. You will love the cheesy pull in every single bite.

Equipment List

Baking Dish: Use a ceramic or glass 9×13 inch pan. It helps the potatoes cook evenly in the oven.
Mandoline Slicer: This is for cutting very thin potato rounds. Uniform slices ensure every piece is soft and tender.
Medium Saucepan: Use this to make the creamy cheese sauce. A heavy bottom prevents the milk from burning quickly.
Whisk: This helps blend the flour and butter smoothly. It removes any lumps from your thick white sauce.
Chef’s Knife: You need a sharp blade for the onions. It makes dicing the aromatics very fast and safe.
Cutting Board: Use a sturdy surface for all your prep. A wooden board works best for slicing heavy vegetables.
Measuring Cups: These ensure your cream and cheese ratios are right. Accuracy is key for a perfect sauce consistency.

Ingredients You Need for Classic Scalloped Potatoes Au Gratin Recipe

Russet Potatoes: These are the best for soaking up sauce. Choose large and firm potatoes with brown dusty skins.
Cheddar Cheese: This provides the classic sharp and salty flavor. Sharp cheddar melts beautifully into the warm cream sauce.
Heavy Cream: This makes the sauce very rich and velvety. It creates a luxury mouthfeel that milk cannot match.
Unsalted Butter: This is used to start the savory roux. It adds a delicious toasted flavor to the base.
All Purpose Flour: This acts as the thickener for the sauce. It keeps the cheese from separating while it bakes.
Yellow Onion: This adds a mild and sweet aromatic depth. Mince it very small so it melts into layers.
Garlic: This provides a sharp and spicy aromatic kick. Use fresh cloves for the best savory smell.
Salt: This enhances the natural earthiness of the potatoes. It brings out the saltiness of the melted cheese.
Black Pepper: This adds a mild and classic earthy heat. It balances the richness of the heavy cream well.
Thyme: This adds a fresh and woody herbal note. It makes the dish smell like a professional kitchen.

How to Assemble

1. Prep the Potatoes

Start by peeling your large Russet potatoes very well. Use a mandoline to slice them into thin rounds. Aim for slices that are about one-eighth inch thick. Keep them in cold water so they do not brown.

2. Sauté the Aromatics

Melt the butter in your saucepan over medium heat. Add the diced onions and minced garlic to the pan. Cook them for three minutes until they look soft. Do not let the garlic turn dark or bitter.

3. Make the Roux

Sprinkle the flour over the buttery onions and garlic. Stir constantly for one minute with your small whisk. This cooks out the raw flour taste very well. The mix should look like a thick golden paste.

4. Build the Sauce

Slowly pour the heavy cream into the warm saucepan. Whisk continuously to avoid any small flour clumps forming. Let it simmer until the sauce thickens like gravy. Remove the pan from the heat once it bubbles.

5. Melt the Cheese

Add half of the shredded cheddar cheese to the sauce. Stir until the cheese is fully melted and smooth. Season the sauce with salt, pepper, and fresh thyme. This is the liquid gold for your potatoes.

6. Layer the Dish

Grease your baking dish with a little bit of butter. Arrange one-third of the potato slices in the bottom. Pour one-third of the cheese sauce over the top. Repeat these layers until you use all the potatoes.

7. Bake to Perfection

Cover the dish with foil and bake at 375 degrees. Cook for forty minutes until the potatoes are very soft. Remove the foil and add the remaining cheese on top. Bake for fifteen more minutes until golden and bubbly.

Recipe Success Tips

➜ Slice the potatoes into even rounds for even cooking.

➜ Use heavy cream for the most indulgent sauce texture.

➜ Do not skip the sautéing of onions and garlic.

➜ Grease the pan well to prevent the cheese sticking.

➜ Rinse the potato starch off before layering the slices.

➜ Cover with foil to prevent the top from burning.

➜ Let the dish rest for ten minutes before serving.

➜ Use sharp cheddar for a much bolder cheese flavor.

➜ Add a pinch of nutmeg for a hidden warmth.

How To Store Leftover

You can store leftovers in the refrigerator quite easily. Keep them in an airtight container for four days.

The sauce will thicken more as it sits and cools. Reheat in the oven at 350 degrees for best results.

You can add a splash of milk if dry. Avoid the microwave to keep the cheese texture nice.

Sides & Pairings Suggestions

This dish is a great partner for roasted ham. It also tastes wonderful with a juicy prime rib. Serve it alongside a fresh green salad for balance.

It works well for a fancy Sunday family dinner. You can add cooked bacon bits on the top. It is a classic side for any holiday feast.

FAQs about Classic Scalloped Potatoes Au Gratin Recipe

What is the difference between scalloped and au gratin?

Scalloped potatoes usually use a simple cream or milk sauce. Au gratin potatoes always include lots of melted cheese. This recipe combines both for the best possible flavor.

Can I use red potatoes for this?

Yes, red potatoes have a nice waxy and firm texture. They will hold their round shape much better than Russets. However, the sauce might not soak in as deeply.

Why is my sauce very thin or runny?

You may not have cooked the roux long enough. Or the potatoes released too much water while they baked. Let the dish rest to help the sauce set.

Can I make this recipe a day ahead?

Yes, you can assemble the dish and keep it cold. Bake it the next day when you are ready. You may need to add ten minutes of cooking.

Final Thoughts

The Classic Scalloped Potatoes Au Gratin Recipe is a winner. It is rich, cheesy, and incredibly easy to prepare.

This recipe is the best way to serve potatoes. You will love the creamy layers and the crust. It is a true crowd-pleaser for any big party.

Share this with your loved ones at your next meal. They will definitely ask for the recipe after one bite!