Potato Casserole Recipe With Corn Flakes: Buttery Layers With Crunchy Topping

This layered potato casserole delivers rich, creamy comfort with a surprise crunchy corn flake topping that takes it to another level.

Every bite offers buttery potatoes beneath a golden, crispy crust—simple to make yet impressive enough for any gathering.

Ingredients for Potato Casserole Recipe with Corn Flakes

Rich, creamy potatoes meet a crispy corn flake topping in this comforting casserole.

The potatoes are the foundation—Russets give that perfect fluffy texture once baked. Sharp cheddar melts beautifully and adds that signature depth (skip the pre-shredded; it’s coated in anti-caking agents). For the milk and sour cream, full-fat is non-negotiable for creaminess. Most supermarkets carry everything, but Whole Foods has excellent organic dairy options if you prefer.

No Russets? Yukon Golds work too, though they’re waxier. Out of cheddar? Gruyère or Monterey Jack at equal amounts. Need a thicker sauce? Add an extra tablespoon of flour. For the topping, crushed corn flakes are classic, but panko or crushed crackers (like Ritz) add a buttery twist. Vegetable broth swaps in seamlessly for the chicken broth.

Assemble and bake immediately, or prep ahead and refrigerate overnight. Leftovers keep 4-5 days in the fridge—reheat covered at 350°F. Freezes beautifully for 3 months (thaw before reheating).

Step-by-Step Instructions for Potato Casserole With Corn Flakes

Master this layered dish with precise technique for creamy potatoes and a perfectly crisp topping.

Step 1: Prepare the Potato Base

Preheat your oven to 375°F. Peel the 3 lb Russet Potatoes and slice them into ⅛-inch thick rounds. I use a mandoline for perfectly even slices, which ensures uniform cooking. Place the sliced potatoes in a large bowl and cover with cold water to prevent browning.

In a saucepan, melt ¼ cup of the 0.5 cup Unsalted Butter over medium heat. Add the finely diced 1 whole Yellow Onion and cook for 5-6 minutes until translucent and soft. Stir in the minced 3 cloves Garlic Cloves and cook for an additional 30 seconds until fragrant.

Step 2: Create the Creamy Cheese Sauce

Sprinkle the 0.25 cup All-Purpose Flour over the onion and garlic mixture, stirring constantly for 1-2 minutes to cook the flour and eliminate any raw taste. Gradually whisk in the 2 cups Whole Milk and 1 cup Chicken Broth, ensuring no lumps form.

Bring the mixture to a gentle simmer, stirring frequently, until it thickens to a velvety consistency that coats the back of a spoon—this should take 3-4 minutes. Remove from heat and stir in the 1 cup Sour Cream, 1.5 tsp Salt, and 0.5 tsp Black Pepper. Fold in 1½ cups of the 2 cups Sharp Cheddar Cheese, reserving the rest for topping.

Step 3: Layer the Casserole

Drain the potatoes and pat them dry with a clean towel. In a greased 9×13-inch baking dish, layer half of the potato slices, slightly overlapping. Pour half of the cheese sauce evenly over the potatoes, then sprinkle with ½ cup of the reserved Sharp Cheddar Cheese.

Repeat with the remaining potatoes, sauce, and cheese. The layers should be even and fully covered—this ensures every bite is rich and flavorful.

Step 4: Add the Corn Flakes Topping and Bake

In a bowl, combine the 2 cups Corn Flakes Cereal with the remaining ¼ cup of melted Unsalted Butter and 0.5 tsp Paprika. Stir until the cereal is evenly coated. Sprinkle this mixture evenly over the top of the casserole, pressing down lightly to adhere.

Bake uncovered in the preheated oven for 45-50 minutes until the top is golden brown and the potatoes are tender when pierced with a knife. If the topping browns too quickly, tent loosely with foil for the remaining time.

Step 5: Rest and Serve

Remove the casserole from the oven and let it rest for 10 minutes before serving. This allows the layers to set and the sauce to thicken slightly, making it easier to serve neat portions.

The top should have a satisfying crunch from the corn flakes, while the potatoes below are creamy and infused with cheesy richness. Serve warm, as the contrast of textures is best enjoyed fresh from the oven.

Health Benefits of This Recipe

Protein Power 💪

This potato casserole packs a protein punch thanks to ingredients like cheese and eggs, which help build and repair muscles. The addition of corn flakes adds a light, crispy texture while contributing a small boost of plant-based protein. It’s a great way to fuel your body without feeling weighed down.

Rich in Vitamins and Minerals 🥗

Potatoes are loaded with vitamin C and potassium, supporting immunity and heart health. The dish also often includes dairy, providing calcium for strong bones. Together, these nutrients make the casserole a balanced side that’s as nourishing as it is delicious.

Energy-Boosting Carbs

The combination of potatoes and corn flakes offers complex carbohydrates for sustained energy. Unlike refined carbs, these take longer to digest, keeping you full and energized. Perfect for busy days or as a comforting side to a hearty meal!