Copycat Ruths Chris Potatoes Au Gratin

Oh, my goodness, are you ready to elevate your dinner game? Because I am absolutely thrilled to share with you my ultimate recipe for Copycat Ruths Chris Potatoes Au Gratin. This isn’t just any potato dish; it’s the potato dish, the one that makes you close your eyes and savor every single bite. What makes this recipe so incredibly special, you ask? Well, it’s our homemade tribute to the legendary side served at Ruth’s Chris Steak House – that luxurious, unbelievably rich, and utterly comforting gratin that usually requires a reservation and a hefty bill to enjoy.

I promise you, dear reader, you are going to fall head over heels for this. Imagine perfectly tender, thinly sliced potatoes, layered lovingly and bathed in a decadent, ultra-creamy, and intensely cheesy sauce. Each forkful delivers that sublime combination of earthy potato, gooey melted cheese, and a hint of something utterly irresistible, all baked to golden-brown perfection with crispy edges and a bubbling, molten center. It’s the kind of side dish that steals the show, transforming any meal into a special occasion. Forget about plain mashed potatoes; this gratin is pure culinary magic, and it’s surprisingly achievable right in your own kitchen!

Ingredient Notes

Crafting the perfect Copycat Ruths Chris Potatoes Au Gratin means paying close attention to the stars of the show – your ingredients. This dish is all about rich, creamy textures and savory, cheesy flavors, so I always recommend opting for quality. Here’s what I use and why, along with a few substitution thoughts.

Potatoes: For that classic Ruths Chris experience, I swear by Russet potatoes. Their high starch content is fantastic for creating a thick, creamy sauce that clings beautifully to each slice. They also hold their shape well enough to provide structure, but become wonderfully tender when baked. If you’re looking for a slightly waxier potato that holds together a bit more firmly and offers a creamier interior, Yukon Golds are a wonderful alternative. Just be sure to slice them uniformly thin, no matter which variety you choose.
Cheese: This is where the magic truly happens for au gratin. I use a combination that delivers incredible depth.
- Gruyère: This is non-negotiable for me. Gruyère provides that distinctive nutty, earthy flavor and melts incredibly smoothly, creating that luxurious, stretchy texture we all adore.
- Sharp White Cheddar: A good quality sharp white cheddar adds a wonderful tang and robust savory punch that balances the richness of the Gruyère. It’s an essential layer of flavor.
- Parmesan (or Parmigiano-Reggiano): A touch of finely grated Parmesan brings a salty, umami kick, enhancing the overall savory profile. I usually reserve this for sprinkling between layers and a final crust.
My personal tip: Always grate your own cheese from blocks! Pre-shredded cheeses often contain anti-caking agents that can prevent them from melting as smoothly and can result in a slightly grainy sauce. Trust me, it makes a huge difference in the final texture and taste of your Copycat Ruths Chris Potatoes Au Gratin.
Heavy Cream: Full-fat heavy cream is the backbone of the sauce. There’s really no substitute here if you want that authentic richness and velvety texture. Lighter creams or milk won’t yield the same luxurious result.
Aromatics: A small amount of finely minced garlic and shallot provides a subtle, savory foundation for our creamy sauce. They infuse the cream with flavor without overpowering the potatoes and cheese. You can substitute with a quarter of a small yellow onion if shallots aren’t available.
Butter & Flour: These are for building a simple roux, which thickens our cream into a luscious sauce. I use unsalted butter to control the seasoning, and all-purpose flour works perfectly.
Seasoning: Beyond salt and freshly ground black pepper, a tiny pinch of nutmeg is a traditional and essential addition to creamy potato dishes and béchamel-based sauces. It brings out the flavors of the dairy and cheese beautifully without being overtly noticeable. Sometimes, I’ll add just a tiny pinch of cayenne pepper for a whisper of warmth, but it’s completely optional.

Step-by-Step Instructions

Making Copycat Ruths Chris Potatoes Au Gratin is a labor of love, but each step is straightforward and contributes to that incredible finished dish. Here’s how I bring it all together:

Prepare the Potatoes:
- First, I peel my Russet potatoes. This helps ensure a smooth texture in the finished dish.
- Next, I slice them as thinly and uniformly as possible, aiming for about 1/8-inch thickness. A mandoline slicer is my secret weapon here – it makes quick work of it and ensures every slice cooks evenly. If you’re using a knife, take your time to get them as consistent as you can.
- Once sliced, I immediately transfer them to a large bowl of cold water. This helps prevent them from browning and removes some of the excess starch, which can make the sauce overly thick. I let them soak for about 15-20 minutes.
- After soaking, I drain the potatoes thoroughly and then lay them out on clean kitchen towels or paper towels. It’s crucial to pat them as dry as possible; any excess moisture can dilute your sauce and prevent it from clinging properly.
Make the Rich Cheese Sauce:
- In a medium saucepan, I melt my unsalted butter over medium heat.
- Once melted, I add the finely minced shallots and garlic and sauté them gently for 2-3 minutes, just until they’re fragrant and softened but not browned.
- Then, I sprinkle in the all-purpose flour and whisk constantly for about 1 minute. This creates a roux, which will thicken our sauce. It should smell slightly nutty.
- Gradually, I pour in the heavy cream, whisking continuously to prevent lumps. I bring the mixture to a gentle simmer, still whisking, and cook for 3-5 minutes until the sauce has thickened to a consistency that coats the back of a spoon.
- I remove the saucepan from the heat and stir in about two-thirds of the grated Gruyère and white cheddar cheeses. I continue stirring until the cheeses are completely melted and the sauce is smooth and luxurious.
- Finally, I season the sauce generously with salt, freshly ground black pepper, and that essential pinch of nutmeg. I always taste it here and adjust the seasoning as needed. Remember, the potatoes themselves won’t be seasoned until they meet this sauce.
Layer and Assemble:
- I preheat my oven to 375°F (190°C).
- Next, I lightly butter a 9×13-inch baking dish.
- I start by spreading a thin layer of the cheese sauce on the bottom of the prepared baking dish. This prevents the bottom layer of potatoes from sticking and ensures every bite is saucy.
- Then, I arrange a single, even layer of dried potato slices over the sauce, overlapping them slightly.
- I ladle another generous amount of cheese sauce over the potatoes, making sure to cover them well.
- I sprinkle a handful of the remaining grated Gruyère, white cheddar, and Parmesan cheeses over the sauce.
- I repeat this layering process – potatoes, sauce, cheese – until all the potatoes are used, ending with a final generous layer of cheese sauce and a sprinkle of all remaining cheeses on top. Make sure to save a little Parmesan for the very top if you like a crispy crust.
Bake to Perfection:
- I cover the baking dish tightly with aluminum foil. This helps to steam the potatoes and ensures they cook through without drying out.
- I bake for 45-50 minutes with the foil on.
- After this time, I remove the foil. The potatoes should be tender when pierced with a fork.
- I return the dish to the oven, uncovered, and continue to bake for another 20-30 minutes, or until the top is beautifully golden brown, bubbly, and irresistibly cheesy.
Rest and Serve:
- This step is absolutely critical! Once out of the oven, I let the Copycat Ruths Chris Potatoes Au Gratin rest for at least 15-20 minutes before serving. This allows the sauce to set properly and prevents it from being runny. It also helps the layers hold together when you scoop it out.
- Then, it’s ready to be scooped and enjoyed!

Tips & Suggestions

To truly nail that Copycat Ruths Chris Potatoes Au Gratin experience, here are a few extra pointers and ideas I’ve picked up along the way:

The Mandoline is Your Best Friend: I cannot stress this enough – a mandoline slicer is a game-changer for this dish. It ensures every potato slice is perfectly thin and uniform, which is key for even cooking and creating that beautiful layered presentation. If you don’t have one, take extra care with your knife to slice as consistently as possible. Inconsistent slices will lead to some potatoes being undercooked and others mushy.
Don’t Rush the Sauce: Allow your cheese sauce to simmer gently and thicken properly. A well-emulsified sauce is crucial for coating every potato slice and contributing to the overall richness. Whisk continuously when adding the cream to prevent lumps.
Season Thoughtfully: Remember to season your sauce adequately. The potatoes themselves will absorb the salt and pepper from the sauce as they bake. Always taste and adjust before layering. A little extra white pepper or even a tiny pinch of cayenne can really elevate the flavor without making it spicy.
The Power of Freshly Grated Cheese: As mentioned in the ingredient notes, freshly grated cheese melts more smoothly and incorporates into the sauce better than pre-shredded varieties. It genuinely makes a significant difference in the final texture and taste of your au gratin.
Don’t Skip the Rest: I know it’s tempting to dive right in, but letting the au gratin rest after baking is vital. This resting period allows the cheese sauce to set up and thicken further, ensuring that your beautiful layers hold together when you serve it. Without resting, it can be a bit runny and fall apart.
Serving Suggestions: This dish is the epitome of comfort food and makes an exquisite side for so many meals. I love serving my Copycat Ruths Chris Potatoes Au Gratin alongside a perfectly roasted beef tenderloin, a succulent prime rib, or even a simple pan-seared chicken breast. It’s also a fantastic addition to any holiday spread or special occasion dinner.
Crispy Top Lovers: If you enjoy an extra crispy, cheesy crust, you can sprinkle a final layer of Parmesan cheese mixed with a tiny bit of paprika (for color) during the last 10-15 minutes of uncovered baking.

Storage

Knowing how to properly store and reheat your Copycat Ruths Chris Potatoes Au Gratin ensures you can enjoy its deliciousness for days to come. Here’s what I recommend:

Cooling: Before storing, it’s important to allow the au gratin to cool completely to room temperature. This helps prevent condensation buildup inside the storage container, which can make the dish watery. I usually let it sit on the counter for at least an hour or two after it’s come out of the oven.
Refrigeration: Once cooled, transfer any leftovers to an airtight container. You can also cover the original baking dish tightly with plastic wrap or aluminum foil if you plan to reheat the entire dish. Stored this way, your Copycat Ruths Chris Potatoes Au Gratin will keep beautifully in the refrigerator for up to 3-4 days.
Freezing: While it is technically possible to freeze potatoes au gratin, I personally advise against it for the best quality. The texture of the potatoes can change significantly after freezing and thawing, sometimes becoming mealy or watery. The creamy sauce can also separate slightly. However, if you must freeze it, my tip is to freeze individual portions in airtight, freezer-safe containers for easier reheating. It can be stored in the freezer for up to 1-2 months. Thaw overnight in the refrigerator before reheating.
Reheating:
- Oven (Recommended): For the best results and to regain that delicious crispy top, I always prefer reheating in the oven. Preheat your oven to 325°F (160°C). Place the au gratin in an oven-safe dish, cover loosely with foil (to prevent drying out), and bake for 20-30 minutes, or until heated through and bubbly. If you want to re-crisp the top, remove the foil for the last 5-10 minutes.
- Microwave (Convenience): If you’re in a hurry, you can reheat individual portions in the microwave. Place a portion on a microwave-safe plate, cover it loosely, and heat on medium power for 1-3 minutes, stirring occasionally, until hot. Be aware that the texture won’t be as good as oven reheating, and the top won’t be crispy. The cheese can sometimes become a bit oilier in the microwave, but it’s a quick fix for a craving!

Final Thoughts

So there you have it, my friends! We’ve just embarked on a delightful culinary journey and landed firmly in a realm of pure indulgence. This Copycat Ruths Chris Potatoes Au Gratin isn’t merely a side dish; it’s a testament to the art of comfort food, elevated to steakhouse perfection.

Imagine those perfectly tender, thinly sliced potatoes, lovingly bathed in a rich, creamy, and oh-so-savory sauce, all crowned with a golden, bubbly blanket of melted cheese. Every single bite is a symphony of textures and flavors, a truly luxurious experience that transforms any meal into a special occasion. It’s the kind of dish that makes you close your eyes and savor the moment.

Whether you’re aiming to impress at your next dinner party, seeking to elevate a simple family dinner, or simply craving the ultimate creamy, cheesy comfort, this Copycat Ruths Chris Potatoes Au Gratin is an absolute must-try. I promise, recreating that iconic, melt-in-your-mouth experience right in your own kitchen is incredibly rewarding, and your taste buds will undoubtedly thank you for it. Go ahead, treat yourself and your loved ones to this unforgettable dish!