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Potatoes Recipes Easy: Copycat Ruth’s Chris Potatoes au Gratin

Potatoes Recipes Easy like this one make you wonder why you'd ever settle for bland sides again. We’ve all had that moment at a steakhouse when the server sets down a dish so rich and golden, it almost steals the spotlight from the main course. That’s exactly what happened to me the first time I met the famous Ruth’s Chris Potatoes au Gratin. This recipe taps into the heart of comfort food, blending the creaminess of Portuguese Potatoes and the flair of Peruvian Potatoes with a nod to good old Onion Soup Potatoes. The sauce? Thick, cheesy, and unapologetically rich—just how it should be. I usually whip it up in a cast iron pan for that rustic, crisp edge. And guess what? It’s healthier than it tastes, falling somewhere near the Healthy Roasted Potatoes spectrum. It hits all the right notes without trying too hard. If you’re someone who tears out pages from Taste Of Home Recipes and tapes them to the fridge (guilty), this dish might just become a permanent fixture in your kitchen. Because let’s be honest—when it comes to potatoes, we all want the gold standard. And this one doesn’t disappoint.
Prep Time15 minutes
Cook Time1 hour
Total Time1 hour 15 minutes
Course: Side Dish
Cuisine: American
Keywords: Cast Iron Potatoes, Healthy Roasted Potatoes, Onion Soup Potatoes, Peruvian Potatoes, Portuguese Potatoes, Potatoes Recipes Easy, Taste Of Home Recipes
Servings: 8 servings
Author: Eleanor

Ingredients

  • 4 large russet potatoes, peeled and sliced 1/4 inch thick
  • 2 cups heavy cream
  • 1/2 cup whole milk
  • 1 1/2 cups shredded cheddar cheese
  • 1/2 cup grated Parmesan cheese
  • 1 small onion, finely diced
  • 2 tablespoons unsalted butter
  • 2 tablespoons all-purpose flour
  • 1/2 teaspoon garlic powder
  • Salt and black pepper to taste
  • Fresh parsley, chopped (for garnish)

Instructions

  1. Preheat your oven to 400°F and lightly grease a 9x13 baking dish.
  2. In a medium saucepan, melt the butter over medium heat. Stir in the diced onions and cook until soft—about 3 to 4 minutes.
  3. Sprinkle the flour into the pan and stir constantly for about a minute to create a roux.
  4. Slowly whisk in the heavy cream and milk, and keep whisking until the mixture begins to thicken.
  5. Add the garlic powder, salt, and pepper, then fold in the cheddar and Parmesan cheeses. Stir until melted and smooth.
  6. Layer half of the sliced potatoes into the prepared dish. Pour half of the cheese sauce over the top. Repeat with the remaining potatoes and sauce.
  7. Cover the dish with foil and bake for 45 minutes. Then remove the foil and bake for another 15 minutes until the top is golden and bubbly.
  8. Let it sit for a few minutes before garnishing with parsley and serving.