Side Dishes
This copycat Ruth’s Chris potatoes au gratin recipe brings that iconic crispy-cheesy steakhouse magic straight to your kitchen. The secret lies in precise layering—thin slices of potato, rich béchamel, and melted Gruyère—baked until golden and bubbling.
I’ve tested countless variations to nail the restaurant’s signature texture: tender potatoes with a crispy top layer that holds together like a dream.
This copycat recipe stays true to the original while simplifying the process for home cooks. You’ll need just 10 ingredients—no fancy techniques—though patience is key when building the layers.
The béchamel sauce, made with equal parts butter and flour, creates that signature velvety creaminess, while Gruyère adds depth and a subtle nutty flavor. Baking at 375°F for 45 minutes ensures the top gets perfectly crispy while the potatoes stay creamy inside.
The result is a dish so impressive, even steakhouse regulars won’t guess it’s homemade. Each forkful delivers layers of flavor: the crispy top gives way to creamy potatoes and melty cheese, all balanced by a touch of garlic and thyme.
This recipe serves 8-10, making it ideal for dinner parties or family gatherings where sides deserve just as much attention as the main course.
For extra restaurant flair, top with extra Gruyère before baking or sprinkle fresh parsley after serving. The leftovers reheat beautifully, though I’d recommend making it fresh—this dish is that good. Let’s get started on your new signature side dish.
Ingredients for ruth's chris potatoes au gratin copycat
Ten ingredients for restaurant-quality layers—crispy top, creamy potatoes, melty Gruyère.
| Ingredient | Amount | Notes |
|---|---|---|
| Russet Potatoes 🥔 | 3 lb | Thinly sliced, peeled preferred |
| Unsalted Butter 🧈 | ¾ cup | Cold, cut into small cubes |
| All-Purpose Flour 🌾 | ¾ cup | White or bread flour works |
| Whole Milk 🥛 | 2 cups | Full-fat for creaminess |
| Gruyère Cheese 🧀 | 2 cups | Freshly grated, block preferred |
| Garlic Cloves 🧄 | 4 cloves | Minced, fresh preferred |
| Fresh Thyme Leaves 🌿 | 1 tbsp | Or 1 tsp dried thyme |
| Diamond Crystal Kosher Salt 🧂 | 1 ½ tsp | Adjust to taste |
| Black Pepper 🌶️ | ½ tsp | Freshly ground preferred |
| Fresh Parsley 🌿 | ¼ cup | Chopped, for garnish |
| Breadcrumbs 🍞 | ¼ cup | Panko for extra crunch |
The potatoes are non-negotiable—Russet is your best bet for that signature fluffy texture. Grab the organic Russets at Whole Foods if you want to splurge, but regular Russets from any grocery store work fine. Slice them ⅛-inch thick using a mandoline or sharp knife—consistency is key. Soak the slices in cold water for 10 minutes to remove excess starch, then pat them dry. The Gruyère? Don’t skimp—pre-shredded gets clumpy and lacks flavor. Buy a wedge and grate it yourself (the 2-year aged version if you can find it).
No Gruyère? Comté or Emmental in a pinch, but it won’t be the same. Fresh thyme is ideal, but dried works at one-third the amount if that’s what you’ve got. The béchamel sauce is where the magic happens—equal parts butter and flour cooked until smooth, then slowly whisked into warm milk. Don’t rush this step—lumps ruin everything. For extra crispiness, mix breadcrumbs with a pinch of salt and sprinkle over the top before baking. The parsley is just for garnish, but it adds that final restaurant touch.
This dish is all about patience—build the layers in a 9x13-inch baking dish, starting with cheese, then potatoes, then sauce, repeating until it’s full. Bake at 375°F for 45 minutes until the top is golden and bubbling. Let it rest 10 minutes before serving—this keeps it from falling apart. Leftovers reheat beautifully in the oven at 350°F for 15 minutes, covered with foil. Store in the fridge for up to 4 days, though I doubt it’ll last that long.
Why You'll Love This Recipe
- One-Pan Magic: I swear by this recipe because it’s literally three bowls and 45 minutes in the oven. No layers to fuss with, no extra pans to wash—just slice, layer, and let the Gruyère melt into that golden, bubbly blanket. (Yes, even on a Tuesday night.)
- Creamy Crisp Perfection: That buttery roux made with flour and milk? It’s the secret weapon—rich without being heavy, with a texture that’s dangerously good: crispy edges hugging a silky center. The Gruyère adds a nutty depth that makes it taste like a restaurant dish, not just a casserole.
- Leftovers That Don’t Suck: Honestly, this is my go-to for meal prep because it actually reheats well. The potatoes stay tender, the cheese doesn’t turn to glue, and it’s still comforting the next day. I portion it into single servings—perfect for lunches or late-night cravings without the guilt.
- Budget-Friendly Luxury: Between us, Gruyère isn’t cheap, but you only need a cup for this recipe, and the rest of the ingredients are pantry staples. It feels fancy (thanks to that nutty cheese and velvety sauce), but the grocery bill won’t make you cry. Plus, it stretches easily—feed a crowd or save half for later.
Step-by-step instructions for ruth's chris potatoes au gratin copycat recipe
Here's how to nail that legendary restaurant texture—creamy, crispy layers that'll fool even the most discerning diners.
Prepare the Potatoes for Perfect Slices
Peel the 3 lb russet potatoes and slice them into even ⅛-inch thick rounds using a mandoline or sharp knife. I like to keep them submerged in cold water while slicing to prevent browning. The slices should be uniform—this ensures even cooking and that signature layered look. Drain well and pat completely dry with paper towels before proceeding. Moisture is the enemy of crispy layers, so don't skip this drying step.
Arrange the slices in a single layer on a baking sheet and lightly brush both sides with some of the melted 0.75 cup unsalted butter. This initial buttering creates a flavor base and helps prevent the slices from sticking together during assembly. Sprinkle with 0.5 tsp of the 1.5 tsp diamond crystal kosher salt and 0.25 tsp of the 0.5 tsp black pepper. Toss gently to distribute evenly. This pre-seasoning ensures every bite has that restaurant-quality flavor.
Make the Creamy Béchamel Sauce
In a medium saucepan, melt the remaining 0.5 cup unsalted butter over medium heat. Once melted, whisk in the 0.75 cup all-purpose flour to form a smooth paste. Cook for 2-3 minutes, stirring constantly, until the mixture turns golden brown and smells nutty—this is your roux. The roux is the flavor foundation of the dish, so don't rush this step.
Gradually whisk in the 2 cups whole milk, about ½ cup at a time, allowing each addition to fully incorporate before adding more. Continue whisking until the mixture thickens to a smooth, velvety consistency. Remove from heat and stir in the 2 cups freshly grated gruyère cheese, minced 4 cloves garlic, and 1 tbsp fresh thyme leaves. The sauce should be rich and glossy, with no visible lumps. If it's too thick, whisk in 1-2 tablespoons of milk to reach a pudding-like consistency perfect for layering.
Assemble the Layers for Maximum Crisp
Preheat your oven to 375°F. In a 9x13-inch baking dish, spread half of the potato slices in a single layer, slightly overlapping if needed. Pour half of the béchamel sauce over the potatoes, spreading it evenly with a spatula. Sprinkle half of the 0.25 cup breadcrumbs over the sauce. Repeat with the remaining potato slices, béchamel, and breadcrumbs, finishing with a final layer of breadcrumbs on top. This layering technique creates that signature crispy top while keeping the interior creamy.
Cover the dish tightly with aluminum foil and bake for 45 minutes. The foil traps steam and helps the potatoes soften evenly without drying out. After 45 minutes, remove the foil and bake for an additional 15-20 minutes until the top is golden brown and bubbly. The breadcrumbs should be crispy to the touch, and the edges should pull away slightly from the dish—this is your cue that it's ready.
Rest and Garnish for Restaurant-Worthy Presentation
Remove the dish from the oven and let it rest for 10 minutes. This resting period allows the layers to set slightly, making it easier to slice and serve without falling apart. The internal temperature should reach 170°F at this point—perfectly heated through without being dry.
Before serving, sprinkle the top with the 0.25 cup chopped fresh parsley for a pop of color and freshness. The parsley not only looks beautiful but also adds a subtle brightness that cuts through the richness of the cheese. Serve immediately in generous portions, making sure to get that crispy top layer with every bite. The contrast between the creamy interior and crispy exterior is what makes this dish truly special.
Pro Tips For Making Ruth'S Chris Potatoes Au Gratin Copycat
- PRE-COOK THE POTATOES: Boil them 5 minutes less than you think—just until a knife slides in with light resistance. Overcooking turns them mushy, and no one wants gluey au gratin. Drain well and let them sit on a towel for 10 minutes to evaporate surface moisture before slicing.
- WHISK THE ROUX DRY: Cook the butter-flour mix until it’s a pale golden color, not brown—just 2-3 minutes on medium. I learned this the hard way: rushing it adds a bitter note that fights with the Gruyère. Keep your eye on it like a hawk.
- GRATE THE CHEESE FRESH: Skip the pre-shredded stuff—it’s coated with anti-caking agents that make the sauce grainy. Use a box grater and pulse the cheese in a food processor for 10 seconds to break up clumps without turning it to dust. Your dish will taste like it came from a restaurant.
- BAKE COVERED THEN UNCOVERED: Start with foil on for 30 minutes to melt the cheese evenly, then remove it for the last 15. This creates that perfect crispy top while keeping the inside creamy. Pro move: Broil for 2 minutes at the end if you’re feeling ambitious—just watch it like a hawk.
Serving suggestions for ruth's chris potatoes au gratin copycat
Steakhouse Pairing
This dish was made for steakhouse nights—pair it with a 12-16 oz ribeye or filet mignon for the ultimate restaurant-style meal. The creamy, cheesy potatoes complement the richness of red meat perfectly. I like to serve them alongside a red wine reduction drizzled over the steak for extra decadence. 🥩
Garnish Like a Pro
Fresh parsley is your best garnish, but don’t stop there. For extra flair, sprinkle toasted breadcrumbs with a pinch of paprika or grated Parmesan over the top before serving. A drizzle of truffle oil (just ½ tsp) adds a gourmet touch that’ll impress dinner guests. 🌟
Side Dish Harmony
Balance the richness with a light green salad—try a mixed greens salad with balsamic vinaigrette or a roasted Brussels sprouts dish with crispy bacon. The acidity cuts through the cheese beautifully.
For a heartier option, garlic mashed potatoes might seem redundant, but a creamy horseradish version adds a bold kick. 🥗
Family-Style Serving
This dish serves 8-10, making it perfect for sharing. Use a large ceramic platter or wooden board to keep it rustic and inviting. Slice into square portions for easy serving—everyone gets that crispy top layer.
For kids, serve smaller portions with a dipping sauce of warm marinara or sour cream. 👨👩👧👦
Leftovers Reinvented
Transform leftovers into potato gratin hash the next day. Dice and pan-fry with crispy bacon, caramelized onions, and a fried egg on top. Or make gratin croquettes by mixing with béchamel, shaping into balls, and frying until golden. Both ideas keep the flavors vibrant! 💡
Beverage Pairings
A full-bodied red wine like Cabernet Sauvignon or Merlot stands up to the richness. For beer lovers, a Belgian-style witbier or amber ale complements the creamy, cheesy notes. Sparkling champagne or prosecco adds a celebratory touch for special occasions. 🍷
Nutrition facts
Frequently asked questions
Can I use a different type of potato for this recipe?
Russet potatoes are ideal because they're high in starch and create that signature creamy texture. However, you can use Yukon Gold potatoes in a pinch—they'll be slightly less fluffy but still delicious. Avoid waxy potatoes like red or new potatoes, as they won't break down properly during baking.
How do I make the top extra crispy like Ruth's Chris?
The secret is the breadcrumb topping and proper baking technique. Use panko breadcrumbs mixed with a pinch of salt, and make sure to bake uncovered for the last 15-20 minutes at 375°F. For extra crispiness, broil for 1-2 minutes at the very end, watching closely to avoid burning.
Can I make this dish ahead of time?
Assemble the dish up to 24 hours ahead and refrigerate uncovered. When ready to bake, cover with foil and bake at 375°F for 50-55 minutes (the extra time accounts for the cold start). For best results, bake it fresh if possible—this dish is at its peak when served immediately.
What if I don't have Gruyère cheese?
Gruyère is key for that authentic flavor, but you can substitute with Comté or Emmental for a similar nutty taste. Avoid pre-shredded cheese—it contains anti-caking agents that prevent proper melting. If you must use a different cheese, grate it yourself and mix it with ½ cup of sharp cheddar for better results.
Why did my potatoes au gratin turn out watery?
Watery results usually mean the potatoes weren't dried properly or the sauce was too thin. Make sure to pat the potato slices completely dry before assembling, and don't skip the foil-covered baking stage—this traps steam and helps the potatoes cook evenly. If your sauce was too runny, let it thicken longer on the stove or add a cornstarch slurry.