Few side dishes feel as indulgent and comforting as Baked Potatoes Au Gratin. With thinly sliced potatoes layered in a rich cream sauce and baked under a golden, bubbling cheese topping, this classic dish is a staple at holiday dinners, Sunday roasts, and cozy family meals.
Originally inspired by the French classic gratin dauphinois, Baked Potatoes Au Gratin have become especially popular in the United States, while also being widely enjoyed in the United Kingdom and Canada. Whether served alongside roast beef, baked ham, or grilled chicken, this creamy potato casserole delivers warmth and satisfaction in every bite.
In this complete guide, you’ll learn how to make perfect Baked Potatoes Au Gratin, plus helpful tips, variations, and serving ideas.
What Does “Au Gratin” Mean?
The term “au gratin” refers to a dish topped with cheese or breadcrumbs and baked until golden and crispy on top. In the case of Baked Potatoes Au Gratin, thin slices of potato are layered with cream and cheese, then baked until tender and beautifully browned.
Unlike scalloped potatoes, which traditionally rely on a cream-based sauce without cheese, Baked Potatoes Au Gratin include generous amounts of melted cheese throughout.
Why Baked Potatoes Au Gratin Are So Popular
This dish is beloved across North America and the UK because it is:
✔ Rich and creamy
✔ Perfect for holidays and gatherings
✔ Easy to prepare ahead
✔ Customizable
✔ A guaranteed crowd-pleaser
From Thanksgiving tables in the United States to festive Christmas dinners in Canada and hearty Sunday roasts in the United Kingdom, this cheesy potato bake fits seamlessly into many traditions.
Key Ingredients for Baked Potatoes Au Gratin
1. Potatoes
Russet potatoes are the most common choice because of their starch content, which helps thicken the sauce. Yukon Gold potatoes offer a naturally buttery flavor and slightly creamier texture.
Slice potatoes thinly—about ⅛ inch thick—for even cooking.
2. Heavy Cream or Milk
Heavy cream creates the richest result, but you can also use whole milk or a combination of milk and cream for a lighter version.
3. Cheese
Classic choices include:
Sharp cheddar
Gruyère
Monterey Jack
Parmesan
Gruyère adds a slightly nutty flavor, while cheddar gives bold, familiar taste.
4. Garlic & Onion
Fresh garlic and thinly sliced onion add depth and balance the richness of the cream and cheese.
5. Butter
Butter enhances flavor and helps create a smooth sauce.
How to Make Baked Potatoes Au Gratin
Step 1: Preheat the Oven
Preheat to 375°F (190°C). Grease a baking dish with butter.
Step 2: Prepare the Cream Mixture
In a saucepan:
Melt butter
Add minced garlic
Pour in cream or milk
Season with salt, pepper, and optional thyme
Heat gently without boiling.
Step 3: Layer the Potatoes
In your baking dish:
Arrange a layer of thin potato slices
Sprinkle cheese
Pour some cream mixture
Repeat layers
Finish with a generous layer of cheese on top.
Step 4: Bake
Cover with foil and bake for 45–50 minutes.
Remove foil and bake an additional 20–25 minutes until golden and bubbly.
The potatoes should be fork-tender.
Step 5: Rest Before Serving
Let the dish sit for 10–15 minutes to allow the sauce to thicken.
Practical Tips for Perfect Baked Potatoes Au Gratin
Slice Potatoes Evenly
A mandoline slicer ensures uniform thickness for consistent cooking.
Use Freshly Shredded Cheese
Pre-shredded cheese contains anti-caking agents that prevent smooth melting.
Don’t Rush the Baking
If the top browns too quickly, loosely tent with foil.
Season Each Layer
Light seasoning between layers ensures balanced flavor throughout.
Delicious Variations
One reason Baked Potatoes Au Gratin remain so popular is their versatility.
Add Protein
Diced ham
Crispy bacon
Shredded chicken
Include Vegetables
Spinach
Mushrooms
Caramelized onions
Leeks
Make It Extra Cheesy
Mix cheese directly into the cream sauce for even more richness.
Herb-Infused Version
Add fresh rosemary or thyme for a fragrant twist.
Serving Suggestions
Baked Potatoes Au Gratin pair beautifully with:
Roast beef
Baked ham
Grilled steak
Roast chicken
Lamb
For balance, serve with a crisp green salad or steamed vegetables.
Storage & Reheating
Refrigeration
Store leftovers in an airtight container for up to 4 days.
Freezing
You can freeze before or after baking. Wrap tightly and freeze for up to 2 months.
Reheating
Reheat in the oven at 350°F (175°C) for best texture. Add a splash of milk or cream if needed.
Common Mistakes to Avoid
❌ Slicing potatoes too thick
❌ Using too little seasoning
❌ Overcooking until dry
❌ Not letting it rest before serving
The perfect Baked Potatoes Au Gratin should be creamy inside with a golden, slightly crisp top.
Why This Dish Works Year-Round
Although often associated with holidays, Baked Potatoes Au Gratin are perfect for any season:
In colder climates like Canada and parts of the UK, they offer warming comfort during winter.
In the United States, they shine at holiday feasts and family gatherings year-round.
Their rich texture and classic flavors make them universally appealing.
Final Thoughts
Baked Potatoes Au Gratin are the ultimate comfort side dish—creamy, cheesy, and beautifully golden. With simple ingredients and straightforward preparation, this dish transforms everyday potatoes into something truly special.
Whether you’re hosting a holiday meal in the United States, preparing a Sunday roast in the United Kingdom, or serving a hearty dinner in Canada, Baked Potatoes Au Gratin bring warmth and indulgence to the table every time.