Side Dishes
Martha Stewart's au gratin potatoes recipe delivers that perfect balance of golden, crispy crust and creamy, velvety layers that make every bite irresistible.
This classic dish transforms simple potatoes into a restaurant-worthy side with just a few key techniques—parboiling for texture, precise layering for structure, and careful baking for that signature caramelized top. I've made these countless times for holiday dinners, and they never fail to impress.
The secret to authentic au gratin lies in the preparation: thinly sliced potatoes layered with a rich béchamel sauce and melted cheese, then finished with crispy breadcrumbs.
What sets this apart is the patience required—letting the potatoes parboil first ensures they cook evenly while maintaining their shape, and baking them covered before browning creates that signature creamy interior.
The result is a dish that's both comforting and elegant, perfect for special occasions or weeknight dinners when you want to feel like you're serving something truly special.
By the time it emerges from the oven, you'll have a casserole with a crispy, golden crust that shatters slightly when cut, revealing layers of tender potatoes bathed in a luscious, cheesy sauce.
The aroma alone will have everyone gathering around the table, and the first bite delivers that perfect contrast of textures—crunchy top, creamy middle, and fluffy potatoes throughout. This is the kind of dish that makes homemade cooking feel like a celebration.
While the traditional recipe is foolproof, you can easily customize it with herbs like thyme or rosemary, or add a sprinkle of smoked paprika for extra depth. Serve it alongside roasted meats or as a hearty vegetarian main with a simple green salad.
Here's everything you need to recreate Martha Stewart's signature au gratin potatoes at home.
Ingredients for martha stewart au gratin potatoes
These twelve ingredients transform humble potatoes into Martha's legendary golden, creamy masterpiece—crispy crust, velvety layers, and that signature aroma.
| Ingredient | Amount | Notes |
|---|---|---|
| Russet Potatoes 🥔 | 3 lb | Thinly sliced (1/8-inch), peeled |
| Unsalted Butter 🧈 | ½ cup | Cold, cubed for béchamel |
| All-Purpose Flour 🌾 | ½ cup | Sifted for smooth sauce |
| Whole Milk 🥛 | 2 cups | Full-fat for creaminess |
| Gruyère Cheese 🧀 | 1 ½ cups | Freshly grated, nutty flavor |
| Sharp White Cheddar 🧀 | 1 cup | Shredded, aged variety |
| Fresh Thyme 🌿 | ¼ cup | Chopped, stems removed |
| Fresh Rosemary 🌿 | ⅛ cup | Finely chopped, aromatic |
| Panko Breadcrumbs 🍞 | ½ cup | Toasted for crispy crust |
| Salt 🧂 | 1 ½ tsp | Diamond Crystal kosher |
| Ground Black Pepper 🌶️ | ½ tsp | Freshly cracked |
| Smoked Paprika 🌶️ | ¼ tsp | For subtle smokiness |
| Heavy Cream 🥛 | ¼ cup | Optional, for extra richness |
The potatoes are non-negotiable—Russets (not Yukon Golds) give that fluffy texture. Slice them 1/8-inch thick using a mandoline for consistency—thinner slices crisp better. Whole Foods or Trader Joe's carry pre-sliced Russets if you're short on time, but fresh-cut makes all the difference. For the cheese, Gruyère from Switzerland (or a good American substitute) is key—it melts beautifully and adds nutty depth. Penzeys carries excellent options if you want to splurge. The fresh herbs? Buy them the day you cook—they make the dish sing.
No Gruyère? Comté or Emmental work in a pinch, but the flavor won't be identical. Short on panko? Toast regular breadcrumbs in the oven (350°F for 5-7 minutes) until crispy. The béchamel can be made ahead—just reheat gently before layering. For the herbs, dried thyme at half the amount works if fresh isn't available, but nothing beats the aroma of fresh. The smoked paprika? Don't skip it—it's what gives Martha's version that subtle smokiness that sets it apart from basic au gratin.
This dish is all about patience. The potatoes need to parboil exactly 5 minutes before layering—any longer and they'll turn to mush. Assemble the casserole and refrigerate at least 2 hours (or overnight) before baking—this ensures the cheese melts evenly and the crust gets perfectly crispy. Leftovers? Reheat covered at 350°F for 15 minutes, then broil 2 minutes for a crispy finish. Freezes beautifully for up to 3 months—just bake straight from frozen, adding 10 minutes to the time.
Why You'll Love This Recipe
- One-Pan Magic: I swear by this recipe when I’m too tired to scrub a million dishes—just peel, slice, and layer. The butter and flour make a velvety sauce that coats everything without a second thought.
- Gruyère Gold: That nutty, melty Gruyère isn’t just fancy—it’s the star. When it browns on top, the whole kitchen smells like a cozy bistro, and every bite has that perfect crispy-cheesy contrast.
- Weeknight Workhorse: I make this for lazy Sundays, last-minute dinner guests, or even a quick lunch with leftover roast beef. The creamy texture pairs with everything—steak, fish, or just a green salad when I’m feeling simple.
- Budget-Friendly Luxury: Russets and Gruyère might sound fancy, but this dish stretches easily. A single batch feeds four, reheats beautifully, and tastes even better the next day—proof that comfort food doesn’t break the bank.
Step-by-step instructions for Martha Stewart's au gratin potatoes
Here's how to create that legendary golden crust and velvety interior—every layer perfect, every bite irresistible.
Prepare the Potatoes for Perfect Layers
Start by peeling the 3 lb russet potatoes and slicing them into paper-thin 1/8-inch slices using a mandoline or sharp knife. I find the mandoline gives the most consistent thickness, which is crucial for even cooking. As you slice, arrange them in a single layer on paper towels to absorb excess moisture—this prevents a soggy gratin. The slices should be completely dry before assembly.
Here's the thing—don't skip the drying step. Wet potatoes will steam instead of crisp, and you'll lose that beautiful golden crust. I like to lay the slices out in one layer and press them gently with another towel to soak up any remaining dampness. Work quickly so they don't oxidize while you prepare the béchamel.
Make the Ultra-Creamy Béchamel Sauce
In a medium saucepan, melt the 0.5 cup unsalted butter over medium heat until it foams. Immediately whisk in the 0.5 cup all-purpose flour and cook for exactly 2 minutes—this creates a proper roux that forms the base of our sauce. You'll see it transform from sandy to smooth and pale golden.
Gradually whisk in the 2 cups whole milk, about 1/4 cup at a time, allowing each addition to fully incorporate before adding more. This slow incorporation prevents lumps and ensures a silky texture. Stir constantly until the sauce thickens enough to coat the back of a spoon—this should take about 5-7 minutes. Season immediately with 1 tsp salt, 0.25 tsp ground black pepper, and 0.125 tsp smoked paprika. For extra richness, stir in the 0.25 cup heavy cream now.
Build the Gratin Layers for Maximum Flavor
Preheat your oven to 375°F. In a 9x13-inch baking dish, start by sprinkling half of the 0.5 cup panko breadcrumbs mixed with 0.5 tsp salt and 0.25 tsp black pepper. This creates our crispy bottom layer. Next, arrange a single layer of potato slices, slightly overlapping them if needed to cover the bottom completely.
Spread half of the béchamel sauce evenly over the potatoes, then sprinkle with half of the 1.5 cups gruyère cheese and all of the 0.25 cup fresh thyme and 0.125 cup fresh rosemary. Repeat the layers—another layer of potatoes, remaining béchamel, and the 1 cup sharp white cheddar. Finish with the remaining breadcrumbs mixed with 1 tsp salt and 0.25 tsp black pepper. This final layer ensures maximum crispiness.
Bake to Golden Perfection
Place the baking dish on the middle rack of your oven and bake uncovered for 45 minutes. After this initial baking time, increase the oven temperature to 425°F and bake for another 15-20 minutes until the top is deep golden brown and the edges are bubbling. The key is watching for that beautiful caramelization—it should look like a perfect golden crust, not just brown.
Real talk: don't be tempted to peek too early. Every time you open the oven, you release steam and can cause the top to collapse. Instead, trust your oven's heat and the visual cues. When you see the crust developing and the cheese is bubbling vigorously, it's almost done. The internal temperature should reach 200°F when checked in the thickest part.
Rest and Serve with Confidence
Remove the gratin from the oven and let it rest for 10-15 minutes before serving. This resting period allows the layers to set and makes it easier to slice through the creamy interior. The contrast between the crispy top and velvety layers is what makes this dish extraordinary.
Slice into perfect squares and serve immediately. Each bite should deliver that irresistible combination of crispy potato edges, creamy béchamel, and melty cheese. The herbs add a bright, aromatic finish that cuts through the richness. For an extra touch, garnish with additional fresh thyme sprigs before serving—it elevates the presentation and adds a pop of color.
Pro Tips For Making Martha Stewart Au Gratin Potatoes
- Soak the Potatoes: Toss peeled Russets in cold water for 10 minutes before slicing—this stops them from turning to mush when they hit the hot butter. I learned this the hard way after making a sloppy, gluey mess that looked more like potato paste than au gratin.
- Melt Butter Low: Cook the butter for the roux on medium-low—not medium, not high—until it’s just golden and smells nutty, about 5-6 minutes. Rush it, and you’ll burn the flour before the milk even goes in, leaving a bitter aftertaste that overpowers the Gruyère.
- Don’t Skimp on Gruyère: Use at least 2 cups of freshly grated Gruyère (not pre-shredded—it’s coated with anti-caking agents that make the top grainy). The cheese is the star here, and cheap substitutes or pre-shredded junk will turn your au gratin into a sad, crumbly disappointment.
- Bake Covered First: Start the dish covered with foil for the first 45 minutes—this lets the potatoes steam and soak up the creamy sauce evenly. Only uncover for the last 10-15 minutes to get that golden, bubbly crust. (Yes, even if you’re impatient like me.)
Make-ahead tips for leftovers
Prep Ahead Strategy
Assemble the entire gratin dish—potatoes, béchamel, and cheese layers—up to 24 hours in advance. Cover tightly with plastic wrap and refrigerate. This chilled prep ensures even melting and a crispier crust when baked.
I always do this for holiday meals because it saves time and enhances flavor development through the night. 🌟
Béchamel Make-Ahead
Prepare the béchamel sauce 1-2 days ahead and store it in an airtight container in the fridge. Reheat gently over low heat, stirring constantly until smooth, before using in your gratin. For extra insurance, whisk in 1 tbsp cold butter at the end to prevent skin formation during storage.
Potato Prep Shortcut
Save time by parboiling the potatoes 1 day ahead and storing them in cold water in the fridge. Drain and pat completely dry before layering. This step prevents soggy potatoes while cutting your active prep time by 15 minutes. Just remember to use fresh béchamel for best texture.
Freezer-Friendly Assembly
For maximum convenience, assemble the entire gratin in a freezer-safe dish and freeze it unbaked for up to 3 months. When ready to bake, thaw overnight in the fridge, then bake as directed—just add 10-15 minutes to the baking time.
The texture remains perfect because the cheese doesn't melt prematurely.
Cheese Prep Tip
Grated cheese loses moisture quickly. Pre-grate your Gruyère and cheddar 1 day ahead and store in a sealed container lined with parchment paper. This prevents clumping and makes assembly faster. For extra crispiness, sprinkle the cheese with 1 tsp cornstarch before storing to absorb any excess moisture.
Oven Preheating Hack
Preheat your oven 15 minutes early and place the baking dish inside while it heats. This eliminates cold spots and ensures even cooking from the moment you put it in.
I also like to place a small baking sheet on the lower rack to catch any potential drips during the high-heat finish. 🔥
Nutrition facts
Frequently asked questions
Why do Martha's au gratin potatoes need parboiling?
Parboiling for exactly 5 minutes ensures the potatoes cook evenly while maintaining their shape. This prevents them from turning mushy during the long baking process. The brief cook also helps them absorb the béchamel better, creating that signature creamy texture. Skipping this step often leads to a soggy bottom layer.
Can I use Yukon Gold potatoes instead of Russets?
While possible, Russets are ideal because their high starch content creates that fluffy, creamy interior. Yukon Golds will make the dish slightly denser and less crispy. If you must use them, slice them 1/16-inch thinner and parboil for 3 minutes instead. For best results, stick with Russets for that authentic Martha Stewart texture.
How do I fix a watery au gratin?
If your gratin looks watery after baking, it's usually from excess moisture in the potatoes or sauce. To salvage it, preheat the broiler and place the dish on the middle rack. Broil for 2-3 minutes until the top is golden and bubbly. This will crisp the surface while keeping the inside creamy. For next time, pat potatoes completely dry and use full-fat dairy.
What's the best way to reheat leftovers?
Cover the gratin with aluminum foil and reheat at 350°F for 15 minutes. Then, broil uncovered for 2 minutes to restore the crispy crust. For microwave reheating, cover with a damp paper towel and heat in 30-second intervals until warm. The foil method preserves the creamy texture best.
Can I make this dish vegetarian?
This recipe is already vegetarian as written. For extra richness, add 1/2 cup vegan butter to the béchamel or stir in 1/4 cup nutritional yeast for a cheesy flavor. The Gruyère and cheddar combination provides plenty of umami without any animal products. It's a perfect side for plant-based mains.