Ruth’s Chris-Style Potatoes Au Gratin Recipe – Creamy, Cheesy, Perfect Side Dish

Ellie Maren | Mugmealmagic
Written By Ellie Maren

creator of Mugmealmagic. I share quick recipes made in a mug, From sweet treats to savory bites, every recipe is microwave-friendly and full of love.

Ruth's Chris-Style Potatoes Au Gratin Recipe – Creamy, Cheesy, Perfect Side Dish

Ruths Chris-Style Potatoes Au Gratin have been my secret weapon for dinner parties for years. There’s something magical about that bubbling cascade of cheese, the tender layers of potatoes, and that unmistakable golden crust that forms on top. I still remember the first time I tasted these at Ruth’s Chris Steakhouse—I nearly forgot about my filet mignon! Today, I’m sharing my perfected version that rivals the restaurant original. If you love decadent side dishes like this, you’ll also adore my garlic butter steak with parmesan cream sauce as a perfect pairing.

Recipe

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Ruth's Chris-Style Potatoes Au Gratin Recipe – Creamy, Cheesy, Perfect Side Dish

Ruth’s Chris-Style Potatoes Au Gratin Recipe

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This Ruth’s Chris-Style Potatoes Au Gratin recipe delivers the same creamy, cheesy indulgence you crave from the famous steakhouse. Thinly sliced potatoes are baked in a rich, velvety cream sauce with melted cheddar and a hint of garlic. The ultimate comfort food side for holidays or special dinners.

  • Total Time: 1 hour 15 minutes
  • Yield: 6 servings

Ingredients

Scale

2 lbs Yukon Gold or Russet potatoes, peeled and thinly sliced

2 tbsp butter

2 cloves garlic, minced

2 tbsp all-purpose flour

1 1/2 cups heavy cream (or half-and-half)

1/2 cup whole milk

1/2 tsp salt

1/4 tsp black pepper

1/8 tsp ground nutmeg (optional)

1 1/2 cups shredded sharp cheddar cheese (plus more for topping)

1/4 cup grated Parmesan cheese

Fresh parsley, chopped (optional, for garnish)

Instructions

1. Preheat oven to 375°F (190°C) and grease a 9×13 baking dish.

2. In a medium saucepan, melt butter over medium heat. Add garlic and cook for 1 minute until fragrant.

3. Whisk in flour and cook 1 minute to form a roux. Gradually whisk in cream and milk until smooth.

4. Stir in salt, pepper, and nutmeg. Simmer for 2–3 minutes until slightly thickened.

5. Remove from heat and stir in cheddar and Parmesan until melted and smooth.

6. Layer half the sliced potatoes in the baking dish. Pour over half the cheese sauce.

7. Repeat with remaining potatoes and sauce. Top with extra cheddar.

8. Cover with foil and bake 40 minutes. Uncover and bake 15–20 more minutes until golden and bubbling.

9. Let rest 10 minutes before serving. Garnish with parsley if desired.

Notes

Use a mandoline for perfectly even potato slices.

Make ahead by assembling and refrigerating up to 1 day in advance.

Swap cheddar for Gruyère or white cheddar for a twist.

  • Author: Ellie Maren
  • Prep Time: 15 minutes
  • Cook Time: 60 minutes
  • Category: Side Dish
  • Method: Baked
  • Cuisine: American
  • Diet: Vegetarian

Why You’ll Love This Ruths Chris-Style Potatoes Au Gratin

Restaurant-Quality Results at Home

This recipe delivers that signature Ruth’s Chris richness without the steakhouse price tag. The combination of heavy cream, three cheeses, and perfectly sliced potatoes creates that unforgettable texture—crispy on top, creamy in the middle. I’ve tested countless versions to nail the exact balance of herbs and seasonings. Last Christmas, my brother-in-law (who claims to hate all vegetables) took three servings and asked for the recipe! The subtle hint of nutmeg and thyme creates depth that elevates these potatoes beyond ordinary casseroles.

Make-Ahead Convenience

One thing I absolutely adore about this recipe is its flexibility for entertaining. You can assemble everything up to 24 hours ahead, refrigerate, and bake just before serving. This has saved me countless times during holiday hosting! The flavors actually develop and meld together in the fridge, creating an even more spectacular result. I often prep these the night before a dinner party, which leaves me free to focus on the main course and enjoy time with my guests instead of frantically cooking while they arrive.

Essential Tips & Tricks

Potato Selection & Preparation

Choosing the right potato variety makes all the difference in this dish. Russets or Yukon Golds work beautifully—Russets for a fluffier texture, Yukons for a buttery, creamy result. I prefer using a mandoline for consistently thin slices (about 1/8 inch thick). This ensures even cooking and that perfect layered look. Before assembling, I always soak my sliced potatoes in cold water for 15 minutes, then pat them completely dry. This removes excess starch and prevents that gluey texture that can ruin potatoes au gratin. Trust me, this extra step is worth every minute!

The Perfect Cheese Blend

The three-cheese combination is what makes this recipe shine. Equal parts gruyère, sharp cheddar, and parmesan create the perfect balance of nuttiness, sharpness, and that signature stretchy pull. I’ve learned to grate the cheese myself rather than using pre-shredded—it melts infinitely better without those anti-caking agents. For an extra touch of decadence, try adding a few tablespoons of cream cheese to the sauce, similar to my creamy lemon garlic pan-seared scallops that uses a similar technique for silky richness.

Serving Ideas & Creative Variations

Perfect Pairings

These potatoes au gratin make a showstopping side dish for almost any protein. They’re particularly magnificent alongside prime rib, filet mignon, or a simple roasted chicken. The rich, creamy texture complements leaner meats beautifully. For a balanced meal, I like to serve them with something green—like roasted asparagus or a simple arugula salad with lemon vinaigrette. The slight bitterness and acidity cut through the richness perfectly. For an impressive holiday spread, these potatoes pair wonderfully with my slow-braised beef roast with cranberry balsamic.

Flavor Variations

While the classic version is perfection, I’ve created some delicious variations over the years. Try adding caramelized onions between the potato layers for subtle sweetness. Bacon lovers can fold in crispy, crumbled bacon for a smoky twist. For a touch of heat, add a pinch of cayenne or some diced jalapeños to the cream mixture. My personal favorite variation includes a layer of sautéed mushrooms with thyme—it adds an earthy umami dimension that’s absolutely divine. For herb lovers, fresh rosemary or sage can replace the thyme for a different aromatic profile.

Storage & Troubleshooting Guide

Proper Storage & Reheating

Leftover potatoes au gratin will keep beautifully in an airtight container in the refrigerator for up to 4 days. For reheating, avoid the microwave which can make them oily and separated. Instead, cover with foil and reheat in a 325°F oven for about 15-20 minutes until warmed through. For freezing, cool completely, wrap tightly in plastic wrap and foil, and freeze for up to 3 months. Thaw overnight in the refrigerator before reheating. The texture may change slightly after freezing, but a splash of cream drizzled over the top before reheating helps restore that luscious creaminess.

Common Issues & Solutions

If your potatoes aren’t cooking evenly, they were likely sliced inconsistently in thickness. A mandoline is worth the investment for perfect results. Curdled sauce usually happens when the heat is too high or the dairy is added too quickly. Always warm your cream before adding, and maintain a gentle simmer. For potatoes that won’t soften, they might be too fresh—believe it or not, slightly older potatoes work better in gratins. If your top is browning too quickly before the center is done, simply cover with foil for part of the baking time to protect that beautiful golden crust.

Frequently Asked Questions

What makes Ruths Chris-Style Potatoes Au Gratin different from regular potatoes au gratin?

The Ruth’s Chris version uses a specific three-cheese blend, heavy cream instead of milk, and precise layering technique. The result is exceptionally rich and creamy with that signature golden crust.

Can I make this dish ahead of time?

Absolutely! Assemble up to 24 hours ahead and refrigerate. Add an extra 10-15 minutes to the baking time if cooking straight from the refrigerator.

What’s the best potato variety to use?

Yukon Golds offer the perfect balance of starch and waxiness. Russets work well too, creating a fluffier texture.

Can I use pre-shredded cheese?

Fresh-grated cheese melts much better. Pre-shredded contains anti-caking agents that can make your sauce grainy.

How thick should I slice the potatoes?

Aim for 1/8-inch thickness for even cooking. A mandoline slicer gives the most consistent results.

Final Thoughts

These Ruths Chris-Style Potatoes Au Gratin have become my signature side dish for good reason—they consistently impress guests and complement virtually any main course. The combination of perfectly sliced potatoes, that heavenly three-cheese sauce, and the golden, bubbling crust creates something truly magical. Whether for holiday gatherings or Sunday family dinners, this recipe delivers restaurant-quality results that will have everyone asking for seconds. Don’t forget to check out my other recipes on Pinterest for more inspiration!

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