Recipe

Au Gratin Potatoes

Creamy, cheesy, and baked until the top is bronzed and bubbly. These rich, savory au gratin potatoes bring holiday comfort with crisp edges and a sauce you will want to scrape from the pan.

By Matt Campbell

•

4.9

A golden brown baking dish of au gratin potatoes with a bubbly cheese crust and fresh thyme on top on a wooden table

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Au gratin potatoes are the holiday side that always disappears first. Not because they are fancy, but because they hit every comfort note at once: tender layers of potato, a garlicky cream sauce that tastes like it simmered all day, and that glorious browned top that crackles when you dig in.

This version keeps it accessible and low drama. We use simple pantry seasonings, a smart cheese combo for melt and flavor, and one small trick that makes the sauce behave: a quick roux that helps it bake up silky and stable. Make it for a festive dinner, a potluck, or a random Tuesday when you want your kitchen to feel like a warm hug.

Thinly sliced potatoes being layered in a buttered casserole dish with cream sauce nearby

Why It Works

Rich, savory sauce that stays smooth: A small roux thickens the dairy so it clings to every slice and helps prevent splitting.
Tender potatoes with structure: Yukon Golds bake up creamy without collapsing into mush.
Real gratin vibes: Gruyere for nuttiness, sharp cheddar for punch, and a browned top that tastes like the best bite of grilled cheese.
Holiday friendly: Can be assembled ahead and baked when you need it, which is basically a gift to your future self.

Pairs Well With

Storage Tips

Refrigerate: Cool completely, then cover the baking dish or transfer to an airtight container. Store up to 4 days.

Reheat (best texture): Bake at 350°F covered for 15 to 20 minutes until hot, then uncover for 5 to 10 minutes to re-crisp the top. A splash of milk or broth around the edges helps if it looks a little tight.

Microwave (fast): It works, but the top softens. Microwave in short bursts and let it sit 1 to 2 minutes so the heat finishes traveling through the center.

Freeze: You can, but cream sauces can turn slightly grainy after thawing. If you do freeze, wrap tightly and freeze up to 2 months for best quality. Thaw overnight in the fridge and reheat covered at 350°F until hot.

Common Questions

What is the difference between scalloped and au gratin potatoes?

Scalloped potatoes are typically baked in a cream or milk sauce and may not include cheese. Au gratin potatoes usually include cheese and often have a browned cheesy top. This recipe is proudly, loudly au gratin.

What potatoes work best?

Yukon Gold is my favorite for a creamy interior and reliable texture. Russets also work and get extra tender, but they can break down more. If you use russets, slice a touch thicker and avoid overbaking.

Should I rinse the potatoes?

For this recipe, do not rinse. That surface starch helps the sauce cling and thicken into those cozy layers we want. If you slice ahead, keep the potatoes covered in cold water to prevent browning, then drain and pat very dry before layering.

Can I make this ahead?

Yes. Assemble up to 1 day ahead, cover, and refrigerate. When you are ready to bake, you can let the dish sit at room temperature for 30 minutes, or bake straight from the fridge and add 10 to 15 minutes to the covered bake time.

Why are my au gratin potatoes still crunchy?

Usually one of three things: slices are too thick, oven runs cool, or the dish is too tightly packed and the liquid cannot circulate. Aim for 1/8-inch slices, keep the cream sauce warm when you pour it, and bake until a knife slides through the center with no resistance.

Can I use pre-shredded cheese?

You can, but it melts less smoothly because of anti-caking agents. If you want the silkiest sauce and the best top, shred your own. It takes 2 minutes and pays you back in cheese pull.

Can I freeze au gratin potatoes?

You can, but dairy-based gratins are texture-variable after thawing. For best quality, wrap tightly and freeze up to 2 months. Thaw overnight in the fridge and reheat covered at 350°F until hot.

Matt Campbell

I have always had a huge passion for the culinary arts, people, working as a team, and so on. I wanted to pursue my love for cooking initially at Virginia Commonwealth University with a culinary arts degree; however, I instead decided to apply myself and acquire more practical skills. My end goal is to eventually open my own restaurant or similar establishment.

Kitchen Essentials

2 to 3-quart baking dish (a 9x13 pan works too, about 3 quarts, with slightly thinner layers)
Mandoline or sharp knife for thin slices (use the hand guard, always)
Medium saucepan
Whisk
Measuring cups and spoons
Foil

I started making au gratin potatoes when I was chasing that holiday-table feeling without needing a culinary degree to pull it off. The first time I made them, I learned the hard way that cream plus heat can be a little moody if you do not give it structure. Once I started building a quick roux and seasoning the sauce like I actually meant it, the whole thing clicked. Now it is my go-to for festive dinners because it feels special, feeds a crowd, and somehow makes every main dish look like it got dressed up for the occasion.