Cheesy Potatoes 🧀🥔

You know those dishes that just disappear at family gatherings? This cheesy au gratin potatoes casserole is absolutely one of them for my family! I started making these years ago after trying countless recipes, and this one truly became my go-to, especially for holidays like Christmas when we have a big crowd. It's the perfect side dish – rich, creamy, incredibly flavorful, and that golden-brown, crispy corn flake topping? Oh my goodness, it's what makes it legendary! I’ve had so many people ask for the recipe, so I wanted to share my tried-and-true method for making these ultimate cheesy potatoes. It's surprisingly easy, even for a large batch, and I promise it'll be a hit at your next event, whether it's Thanksgiving, Christmas dinner with that delicious ham, or just a cozy family supper. Here’s my personal list of ingredients for this crowd-pleasing dish: 2 lbs Russet potatoes, peeled and thinly sliced (about 1/8 inch thick) 1/2 cup (1 stick) unsalted butter 1/2 cup all-purpose flour 4 cups milk (whole milk works best for creaminess!) 1 tsp salt 1/2 tsp black pepper 1/4 tsp garlic powder (my little secret for extra flavor!) 4 cups shredded cheddar cheese, divided (sharp or medium, whichever you prefer!) 1 cup crushed corn flakes 2 tbsp melted butter (for the topping) And here’s my step-by-step guide to get that perfect cheesy goodness: Prep the Potatoes: First, I peel my potatoes and slice them thinly. I usually use a mandoline to get them uniformly thin, which helps them cook evenly. Then, I set them aside in a bowl of cold water to prevent browning while I make the sauce. Make the Roux: In a large saucepan or Dutch oven, I melt the 1/2 cup of butter over medium heat. Once melted, I whisk in the flour and cook for about 1-2 minutes, stirring constantly, until it forms a smooth paste (this is your roux!). Whip up the Cheese Sauce: Gradually, I whisk in the milk, making sure there are no lumps. I bring the mixture to a simmer, stirring frequently, until it thickens. This usually takes about 5-7 minutes. Once it's nice and thick, I remove it from the heat and stir in the salt, pepper, garlic powder, and 3 cups of the shredded cheddar cheese until it's all melted and smooth. Taste and adjust seasoning if needed – sometimes I add a pinch more salt! Layer the Casserole: I preheat my oven to 375°F (190°C). Then, I drain the sliced potatoes really well. I take a 9x13 inch baking dish and spread about a third of the potatoes evenly on the bottom. Then, I pour about a third of the cheese sauce over the potatoes. I repeat these layers two more times, ending with a layer of cheese sauce. Add the Crispy Topping: In a small bowl, I mix the crushed corn flakes with the remaining 1 cup of shredded cheddar cheese and 2 tablespoons of melted butter. I sprinkle this mixture evenly over the top of the casserole. This crispy corn flake topping is truly a game-changer! Bake to Golden Perfection: I cover the baking dish loosely with aluminum foil and bake for 45 minutes. Then, I remove the foil and continue baking for another 20-30 minutes, or until the potatoes are tender (I check with a fork!) and the topping is beautifully golden-brown and bubbling. Rest and Serve: Let the casserole rest for about 10-15 minutes before serving. This allows the sauce to set a bit and makes serving much easier. My Pro Tips for Success: Make Ahead: You can assemble the casserole (without the corn flake topping) a day in advance, cover it, and refrigerate. Add the topping just before baking. You might need to add an extra 10-15 minutes to the baking time if baking from cold. Cheese Variations: While cheddar is my classic, sometimes I’ll mix in a bit of Gruyere or Monterey Jack for a different flavor profile. Spice It Up: A pinch of cayenne pepper in the cheese sauce can add a nice subtle kick! I hope you love this au gratin potatoes recipe as much as my family and I do. It truly elevates any meal and is guaranteed to get rave reviews!