Ruth’s Chris Potatoes au Gratin Copycat Recipe – Restaurant Quality at Home

Every time I make these creamy, decadent potatoes au gratin, I’m reminded why Ruth’s Chris Steakhouse has such a devoted following. This copycat recipe captures that same rich, indulgent quality that makes these potatoes so memorable—layers of tender russet potatoes swimming in a luxurious cream sauce that’s both simple and sophisticated.

Why This Ruth’s Chris Potatoes au Gratin Works

The secret lies in the simplicity and quality of ingredients. Unlike many restaurant copycat attempts that overcomplicate things, this recipe focuses on what Ruth’s Chris does best: letting premium ingredients shine through proper technique and careful attention to detail.

Ingredients

• 3 pounds russet potatoes, peeled and sliced 1/8-inch thick
• 2 cups heavy whipping cream
• 1 cup whole milk
• 3 cloves garlic, minced
• 2 tablespoons butter
• 1 tablespoon fresh thyme leaves
• 1 teaspoon salt
• 1/2 teaspoon black pepper
• 1/4 teaspoon nutmeg
• 1 1/2 cups Gruyère cheese, grated
• 1/2 cup Parmesan cheese, grated
• 2 tablespoons chives, chopped (for garnish)

The key to achieving restaurant-quality results starts with selecting the right ingredients and preparing them with care.

Don’t miss this delicious recipe: Creamy Potato Gratin Recipe with Gruyère Cheese

How to Make It

1. Preheat your oven to 375°F and butter a 9×13-inch baking dish. Using russet potatoes is crucial here—their high starch content creates the creamy texture we’re after. Slice them consistently using a mandoline or sharp knife, aiming for 1/8-inch thickness. Thicker slices won’t cook evenly, while thinner ones may fall apart.
2. In a large saucepan over medium heat, combine the heavy cream, whole milk, minced garlic, butter, thyme, salt, pepper, and nutmeg. Heat this mixture until it just begins to simmer—you’ll see small bubbles forming around the edges. Don’t let it boil vigorously, as this can cause the cream to break or curdle.
3. While the cream mixture heats, arrange half of the sliced potatoes in overlapping layers in your prepared baking dish. The overlapping technique isn’t just for show—it helps the potatoes hold together while creating those beautiful layers that Ruth’s Chris is known for.
4. Pour half of the warm cream mixture over the first layer of potatoes, making sure it reaches all corners of the dish. Sprinkle half of the Gruyère cheese evenly over the surface. The Gruyère is what gives these potatoes their distinctive nutty, complex flavor that sets them apart from basic au gratin recipes.
5. Layer the remaining potatoes in the same overlapping pattern, then pour the rest of the cream mixture over the top. The liquid should come up to just below the top layer of potatoes—if it doesn’t quite reach, add a bit more cream or milk.
6. Sprinkle the remaining Gruyère and all of the Parmesan cheese over the top layer. The combination of these two cheeses creates both the creamy interior and the golden, slightly crispy top that makes this dish so appealing.
7. Cover tightly with aluminum foil and bake for 45 minutes. This initial covered baking period allows the potatoes to steam and become tender without the top browning too quickly.
8. Remove the foil and continue baking for another 25-30 minutes, until the top is golden brown and the potatoes are tender when pierced with a fork. The surface should be bubbly and have developed a beautiful golden color.
9. Let the dish rest for 10-15 minutes before serving—this cooling time allows the cream to thicken slightly and makes serving much easier. Garnish with freshly chopped chives for that final restaurant touch.

This method creates the same rich, creamy texture and golden presentation that makes Ruth’s Chris potatoes au gratin so special.

Nutrition at a Glance

• High in calcium from the cheese and cream
• Good source of potassium from the russet potatoes
• Contains vitamin C and B6
• Rich in protein from the dairy ingredients
• Provides energy from complex carbohydrates
• Contains beneficial probiotics if using cultured dairy
• High in saturated fat—best enjoyed in moderation
• Approximately 380 calories per serving

How to Serve It

• Pairs beautifully with grilled or roasted beef, especially steaks
• Complements roasted chicken or pork tenderloin wonderfully
• Serves as an elegant side dish for holiday meals
• Works well alongside simple green vegetables like asparagus or green beans
• Can be the star of a vegetarian dinner with a fresh salad
• Excellent for dinner parties—can be prepared partially ahead
• Perfect for special occasions when you want restaurant-quality sides

The rich, creamy nature of these potatoes means they work best with simple, clean flavors that won’t compete with their luxurious texture.

Common Mistakes

• Slicing potatoes too thick or unevenly, leading to uneven cooking
• Using low-fat dairy products, which won’t create the same rich texture
• Boiling the cream mixture too vigorously, causing it to curdle
• Skipping the resting period after baking, making the dish difficult to serve neatly
• Using pre-shredded cheese instead of freshly grated, which doesn’t melt as smoothly
• Not seasoning adequately—potatoes need more salt than you might think
• Overbaking until the top becomes too dark and the cream separates
• Using waxy potatoes instead of starchy russets, preventing proper creaminess

Avoiding these pitfalls will help ensure your homemade version rivals the restaurant original.

Storage and Reheating

• Refrigerate leftovers within 2 hours of serving in airtight containers
• Properly stored, the dish keeps for 3-4 days in the refrigerator
• Reheat individual portions in the microwave at 50% power to prevent overcooking
• For larger portions, reheat in a 325°F oven covered with foil for 20-25 minutes
• Add a splash of cream or milk if the mixture seems too thick after refrigeration
• Freezing isn’t recommended as the dairy-based sauce may separate when thawed
• Let refrigerated portions come to room temperature for 15 minutes before reheating

Proper storage and gentle reheating help maintain the creamy texture that makes this dish so appealing.

Leftover Ideas

• Use as a base for loaded potato skins—scoop out and refill potato shells
• Transform into a hearty breakfast hash with added eggs and bacon
• Incorporate into a shepherd’s pie as the top layer instead of regular mashed potatoes
• Make potato croquettes by chilling, forming into patties, and pan-frying
• Create a creamy potato soup by thinning with additional broth and cream
• Use as a filling for savory hand pies or turnovers
• Layer into a breakfast casserole with eggs and sausage

These creative applications help ensure nothing goes to waste while giving you entirely new meals to enjoy.

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