Ruth's Chris Potatoes Au Gratin Copycat Recipe: Layered Cheese Crunch Over Buttery Cream

This Ruth's Chris Potatoes Au Gratin copycat recipe delivers the same luxurious, golden layers of cheesy crunch and velvety cream sauce you'd expect from their signature dish.

After years of perfecting the technique, I've cracked the code to recreating that signature texture—crispy top, tender potatoes, and a rich, buttery cheese sauce that clings to every layer. The secret lies in precise layering and a foolproof sauce that doesn't separate, even after reheating.

The process starts with thinly sliced potatoes that cook evenly, absorbing the creamy sauce without turning mushy. A blend of sharp cheddar, Gruyère, and cream cheese creates that signature melty, slightly crispy texture, while a touch of Dijon mustard adds depth to the sauce.

Baking at 375°F for 45 minutes ensures the top gets perfectly golden and crunchy while keeping the center tender. This isn't just a side dish—it's a showstopper that rivals the restaurant version.

What makes this recipe truly special is how it captures the restaurant-style presentation—those golden, crackly cheese layers on top and the creamy sauce peeking through.

The aroma alone will have your guests asking for seconds, and the texture is exactly what you'd expect from Ruth's Chris: rich, indulgent, and impossible to resist. Whether served alongside steak or as a standalone dish, this potatoes au gratin is a game-changer for home cooking.

Ready to impress? This recipe scales perfectly for dinner parties or family gatherings, and leftovers reheat beautifully. The key is patience during assembly and baking—every layer counts. Let's bring that signature restaurant flavor to your table with this foolproof copycat version that tastes just like the original.

Ingredients for ruth's chris potatoes au gratin copycat

Six ingredients create the signature Ruth's Chris texture—crispy cheese layers and velvety sauce.

The potatoes are non-negotiable—Yukon Golds have that buttery texture that holds up to layering. Grab them from Whole Foods or the organic section at Kroger for the best flavor. Thinly slicing them is key: 1/8-inch thick ensures even cooking without mushiness. If you don't have a mandoline, a sharp knife and patience work too. The cheeses are where the magic happens—sharp white cheddar for tang, Gruyère for nutty depth, and cream cheese for that signature melt. Buy them pre-grated if you're short on time, but freshly grated makes all the difference.

No Gruyère? Parmesan or Emmental work in a pinch, but the flavor won't be identical. The cream cheese can be swapped for cream cheese spread (like Philadelphia) if you're in a hurry, though it won't be as rich. For the wine, any dry white works—Chardonnay or Pinot Grigio are solid backups. The shallots can be swapped for regular onions, but they add a subtle sweetness that's worth the effort. If you're avoiding wine, use chicken broth plus a splash of lemon juice for brightness. The Dijon mustard is crucial—it cuts through the richness and adds complexity, so don't skip it.

This dish reheats like a dream—375°F for 15-20 minutes until bubbly. Leftovers keep for 4-5 days in the fridge, though they're best within 2 days for peak texture. For make-ahead convenience, assemble the dish in a baking dish, cover with foil, and refrigerate for up to 24 hours before baking. The cheese sauce can be made a day ahead and reheated gently on the stove—just add a splash of milk or cream to loosen it. The crispy top? That's all about timing—don't overbake, or it'll turn to dust.

Step-by-step instructions for ruth's chris potatoes au gratin

Here's how to recreate that legendary restaurant version with crispy layers and ultra-creamy filling.

Peel the 3 lb yukon gold potatoes and slice them into even 1/8-inch thick rounds using a mandoline or sharp knife. I find soaking them in cold water for 10 minutes first helps prevent sticking. Drain and pat completely dry with paper towels—moisture is the enemy of crispy layers.

Bring a large pot of salted water to a boil and add the sliced potatoes. Parboil for exactly 5 minutes until they're just tender but still firm to the bite. Drain immediately and transfer to an ice bath to stop the cooking process. This step ensures your potatoes will be perfectly tender when baked, not mushy.

In a large saucepan, melt the 0.5 cup unsalted butter over medium heat. Add the 2 whole shallots and 4 cloves minced garlic, cooking for 3-4 minutes until soft but not browned. Pour in the 0.5 cup dry white wine and let it reduce by half, about 3 minutes.

Lower the heat to medium-low and stir in the 8 oz cream cheese, 2 cups heavy whipping cream, and 1 tbsp dijon mustard until completely smooth. Add the 2 cups sharp white cheddar cheese and 1 cup gruyère cheese, stirring constantly until fully melted. Season with 1.5 tsp diamond crystal kosher salt and 0.5 tsp freshly ground black pepper. The sauce should be thick but pourable—if it's too thick, whisk in 1-2 tablespoons of milk.

Preheat your oven to 375°F. Lightly brush a 9x13-inch baking dish with 1 tbsp of the extra-virgin olive oil. Begin by spreading half of the parboiled potatoes in a single layer on the bottom, slightly overlapping if needed. Pour half of the cheese sauce evenly over the potatoes, then sprinkle half of the 0.5 cup panko breadcrumbs.

Repeat with the remaining potatoes, sauce, and breadcrumbs. The top layer should be potatoes with breadcrumbs sprinkled on top. Press down gently to ensure good contact between layers. This creates the signature crunchy texture while keeping the interior creamy.

Bake uncovered for 45 minutes, then increase the oven temperature to 425°F. Continue baking for another 15-20 minutes until the top is deep golden brown and the edges are bubbling. The key is watching for that perfect toasted breadcrumb crust while keeping the interior creamy.

Let the gratin rest for 10 minutes before serving—this allows the layers to set slightly and makes slicing cleaner. The result should be crispy on top, creamy in the middle, and perfectly tender potatoes throughout. Serve immediately with a dollop of extra sauce if desired.

Essential equipment for great ruth's chris potatoes au gratin copycat

Mandoline Slicer

This is the single most important tool for achieving that signature restaurant texture. A high-quality mandoline like the OXO Good Grips ensures perfectly even 1/8-inch slices every time. I've tried cheaper models, but they struggle with potatoes and create uneven layers that cook inconsistently.

The good news? You can rent one from Home Depot or Lowe's if you don't want to invest yet.

9x13-inch Baking Dish

Never use a glass dish smaller than 9x13 inches—this recipe is designed to fill that space completely. I recommend a heavy-duty stainless steel dish like All-Clad Stainless Steel for even heat distribution.

If you only have glass, choose tempered glass like Pyrex to prevent cracking during the high-heat finish. The dish should be deep enough to hold all layers without overflowing.

High-Quality Cheese Grater

A microplane-style grater like the KitchenAid Classic Grater makes all the difference for freshly grated cheese. Pre-grated cheese contains anti-caking agents that prevent proper melting. For the Gruyère, use the fine side to get those perfect meltable curds.

I find that freshly grated cheese creates that signature restaurant texture—smooth, creamy, and perfectly melted throughout.

Digital Meat Thermometer

While not strictly necessary, a good thermometer like the Thermoworks Sous Vide ensures your gratin reaches the perfect internal temperature. Aim for 160°F at the center before serving—this guarantees perfectly tender potatoes without being mushy. I use it to check after the initial 45 minutes of baking to avoid overcooking.

Pastry Brush

A quality pastry brush like the West Bend Silicone Pastry Brush is perfect for lightly oiling each layer. I brush each potato layer with extra-virgin olive oil before adding sauce—this prevents the potatoes from sticking together and creates a subtle crispiness.

The silicone bristles clean up easily and last for years, unlike cheap brushes that shed fibers.

Mixing Bowls Set

Invest in a set of stainless steel mixing bowls (like Cuisinart MultiClad) in various sizes for prep work. I use a medium bowl for the cheese sauce and a large bowl for tossing the parboiled potatoes with a bit of oil before layering.

Stainless steel bowls are durable and won't absorb odors like plastic.

Frequently asked questions