Ruth’s Chris Potatoes Au Gratin Copycat Recipe

You’re making a Ruth’s Chris Potatoes Au Gratin copycat recipe that delivers the same rich, creamy, steakhouse-style side dish at home. This is perfect for holidays, dinner parties, or anytime you want a reliable crowd-pleaser that feels indulgent but approachable.

Timing

• Prep Time: 20 minutes
• Cook Time: 55–60 minutes
• Total Time: About 1 hour 20 minutes
• Servings: 6 generous portions

Ingredients You’ll Need

Potatoes

• 2 pounds russet potatoes, peeled and sliced very thin (about 1/8 inch)

Creamy Cheese Sauce

• 2 cups heavy cream
• 1 cup whole milk
• 1 ½ cups freshly grated sharp cheddar cheese
• ½ cup freshly grated Parmesan cheese

Flavor Builders

• 2 cloves garlic, finely minced
• 1 teaspoon kosher salt
• ½ teaspoon black pepper
• ¼ teaspoon cayenne pepper (optional, but traditional)

For the Dish

• 1 tablespoon unsalted butter, for greasing the baking dish

Step-by-Step Instructions

Step 1: Prep the Potatoes

You start by peeling the russet potatoes and slicing them very thin, about 1/8 inch thick. This takes around 10 minutes. Thin slices matter because they cook evenly and absorb the cream sauce without staying crunchy in the center.

Chef’s Tip: Use a mandoline if you have one; consistent slices mean consistent texture.

Step 2: Warm the Cream Mixture

In a medium saucepan, you gently heat the heavy cream, milk, garlic, salt, pepper, and cayenne over medium-low heat for about 5–7 minutes. You’re not boiling it, just warming it so the garlic infuses and the sauce blends smoothly later.

Chef’s Tip: If the cream boils, it can separate later, so keep the heat gentle.

Step 3: Add the Cheese

You slowly whisk in the cheddar and Parmesan, a handful at a time, until the sauce is smooth and slightly thickened. This takes about 3–4 minutes. Adding cheese gradually prevents clumping and keeps the sauce silky.

Chef’s Tip: Grate your own cheese; pre-shredded cheese doesn’t melt as smoothly.

Step 4: Assemble the Dish

You butter a baking dish and layer half the sliced potatoes evenly across the bottom. Pour half the cheese sauce over them, then repeat with the remaining potatoes and sauce. This layering ensures every bite tastes rich and balanced.

Chef’s Tip: Gently press the potatoes down so they’re fully coated in sauce.

Step 5: Bake Until Tender

You cover the dish with foil and bake at 375°F (190°C) for 40 minutes. This allows the potatoes to steam and soften fully. Then you remove the foil and bake another 15–20 minutes until bubbly and lightly golden on top.

Chef’s Tip: Foil first prevents the top from browning before the potatoes are tender.

Step 6: Rest Before Serving

Once baked, you let the potatoes au gratin rest for 10 minutes. This helps the sauce set slightly so it serves cleanly instead of running everywhere.

Chef’s Tip: Resting improves texture and makes plating easier.

Potatoes Au Gratin (Steakhouse-Style) Nutrition (Per Serving)

Based on 6 servings

(Estimated using heavy cream, whole milk, full-fat cheddar & Parmesan.)

Why You’ll Love This Recipe?

• It tastes like the Ruth’s Chris steakhouse classic without the restaurant price
• The creamy texture stays smooth, not grainy
• Beginner-friendly steps with forgiving timing
• Perfect for holidays, steak dinners, or special occasions
• Uses simple ingredients you can find anywhere

Common Mistakes to Avoid

• Slicing potatoes too thick: Thick slices won’t cook evenly; keep them thin.
• Boiling the cream: High heat causes separation and grainy sauce.
• Using pre-shredded cheese: Anti-caking agents affect melting.
• Skipping the resting time: Cutting too soon makes the sauce runny.
• Overbrowning the top: Cover with foil first to avoid burning.

Serving Suggestions

• Serve alongside grilled steak, roast chicken, or pork tenderloin
• Pair with a crisp green salad to balance richness
• Spoon leftovers into a breakfast skillet with eggs
• Use as a decadent holiday side dish centerpiece
• Serve in small ramekins for dinner parties

Healthier Alternatives and Ingredient Swaps

• Use half-and-half instead of heavy cream for a lighter sauce
• Swap some potatoes for thinly sliced cauliflower
• Use reduced-fat cheese while keeping full flavor
• Add roasted garlic instead of raw for gentler flavor
• Use lactose-free milk and cheese if needed

Storage and Meal Prep Tips

• Store leftovers in an airtight container for up to 4 days
• Reheat covered in the oven at 325°F for best texture
• Avoid microwaving if possible; it can separate the sauce
• Assemble up to one day ahead and bake fresh
• Freeze only if necessary; texture is best fresh

Conclusion

This Ruth’s Chris Potatoes Au Gratin copycat recipe works because it respects technique without overcomplicating the process. Once you master it, you can adjust seasoning, cheese, or richness to make it truly yours while keeping that signature steakhouse flavor.

Ruth’s Chris Potatoes Au Gratin Copycat Recipe

You’re making a Ruth’s Chris Potatoes Au Gratin copycat recipe that delivers the same rich, creamy, steakhouse-style side dish at home. This is perfect for holidays, dinner parties, or anytime you want a reliable crowd-pleaser that feels indulgent but approachable.

Print Recipe Pin Recipe

Prep Time 20 minutes mins

Cook Time 1 hour hr

Total Time 1 hour hr 20 minutes mins

Servings: 6 Portions

Ingredients Method Notes

Ingredients

  

Potatoes

• 2 pounds russet potatoes, peeled and sliced very thin (about 1/8 inch)

Creamy Cheese Sauce

• 2 cups heavy cream
• 1 cup whole milk
• 1½ cups freshly grated sharp cheddar cheese
• ½ cup freshly grated Parmesan cheese

Flavor Builders

• 2 cloves garlic, finely minced
• 1 teaspoon kosher salt
• ½ teaspoon black pepper
• ¼ teaspoon cayenne pepper (optional, but traditional)

For the Dish

• 1 tablespoon unsalted butter, for greasing the baking dish

Method

 

1. Preheat oven to 375°F and butter a baking dish.
2. Warm cream, milk, garlic, and seasonings over medium-low heat. Stir in cheeses until smooth.
3. Layer half the sliced potatoes in the dish and pour over half the sauce. Repeat layers.
4. Cover with foil and bake 40 minutes. Remove foil and bake 15–20 minutes until tender and golden.
5. Rest 10 minutes before serving.

Notes

• Slice potatoes very thin for even cooking.
• Keep cream at a gentle heat, do not boil.
• Grate cheese fresh for the smoothest melt.
• Cover first to prevent over-browning.
• Rest before serving so sauce sets properly.