Cheesy Potato Casserole
Cheesy potato casserole turns frozen diced potatoes into a creamy, golden comfort food bake with a crisp cornflake topping and rich cheddar flavor.
This is the kind of simple, from-scratch-style side dish that saves dinner when the fridge feels bare. It uses pantry staples, frozen potatoes, and a short prep time, but it tastes like a cozy family favorite.
Why You Will Love This Recipe
- Creamy center: Sour cream, cream of chicken soup, and melted cheddar coat every potato piece.
- Crispy topping: Buttered crushed cornflakes bake into a golden, crunchy crust.
- Easy prep: Frozen diced potatoes skip peeling, chopping, and boiling.
- Great for sharing: It fits a family dinner, potluck, holiday table, or simple weekend meal.
Fabian’s Budget Tip: Buy store brand frozen diced potatoes and shred a block of cheddar yourself. Block cheese usually costs less per ounce and melts smoother than bagged shredded cheese.
Ingredients (Serves 4)
- 24 ounces frozen diced potatoes, thawed slightly (680 g)
- 1 cup sour cream (240 g)
- 1 can cream of chicken soup, 10.5 ounces (298 g)
- 2 cups shredded cheddar cheese (225 g)
- 1 half cup melted butter, divided (113 g)
- 1 half cup finely chopped onion (75 g)
- 1 teaspoon garlic powder (3 g)
- 1 half teaspoon salt (3 g)
- 1 fourth teaspoon black pepper (1 g)
- 2 cups crushed cornflakes (60 g)
Step-by-Step Instructions
1. Heat the Oven and Prep the Dish
Heat your oven to 350°F (175°C). Grease an 8 inch square baking dish with a little butter or cooking spray. The dish should be ready before you mix, because the creamy potato filling comes together fast.
2. Mix the Creamy Potato Filling
Add the thawed diced potatoes, sour cream, cream of chicken soup, shredded cheddar, 6 tablespoons of the melted butter, chopped onion, garlic powder, salt, and black pepper to a large bowl. Stir until the potatoes look evenly coated and the cheese is scattered through the mixture.
The filling should look thick, creamy, and speckled with onion and cheddar. If the potatoes are very frozen, let the bowl sit for 5 minutes, then stir again so the sauce can cling to every piece.
3. Spread It Into the Baking Dish
Spoon the potato mixture into the prepared dish. Spread it into an even layer and press it gently into the corners. Do not pack it too tightly. A loose layer helps the casserole heat evenly and stay creamy inside.
4. Add the Buttered Cornflake Topping
In a small bowl, mix the crushed cornflakes with the remaining 2 tablespoons of melted butter. Stir until the flakes look lightly glossy. Scatter them over the potatoes in an even layer so every serving gets a crisp bite.
5. Bake Until Bubbly and Golden
Bake for 40 to 45 minutes, until the edges bubble and the cornflakes turn deep golden. The kitchen should smell buttery, cheesy, and toasty. Let the casserole rest for 5 to 10 minutes before serving so the creamy filling settles and scoops cleanly.
Expert Troubleshooting & FAQs
Can I bake this cheesy potato casserole from frozen potatoes?
Yes, but slightly thawed potatoes give the best texture. If your potatoes are still frozen solid, add 10 to 15 minutes to the bake time and cover the dish loosely with foil for the first half of baking.
Why is my casserole watery?
Extra moisture usually comes from frozen potatoes. Let them thaw a little, then drain any icy liquid from the bag or bowl before mixing. Resting the baked casserole also helps the sauce thicken.
Can I use fresh potatoes instead?
Yes. Dice peeled potatoes into small cubes, then simmer them until just tender. Drain them well and cool them slightly before mixing with the sauce. Do not overcook them, or the casserole can turn mushy.
What can I use instead of cream of chicken soup?
You can use cream of mushroom soup or cream of celery soup. For a homemade option, use a thick white sauce made with butter, flour, broth, and milk. Keep it thick so the casserole stays creamy.
How do I store and reheat leftovers?
Cover leftovers and refrigerate for up to 4 days. Reheat portions in the oven at 325°F (165°C) until warm. The oven keeps the topping crisper than the microwave.
Estimated Nutritional Facts
Per serving, based on 4 servings:
- Calories: about 560
- Protein: about 14 g
- Carbs: about 45 g
- Fats: about 37 g
Cheesy Potato Casserole
Ingredients
- 24 ounces frozen diced potatoes, thawed slightly (680 g)
- 1 cup sour cream (240 g)
- 1 can cream of chicken soup, 10.5 ounces (298 g)
- 2 cups shredded cheddar cheese (225 g)
- 1 half cup melted butter, divided (113 g)
- 1 half cup finely chopped onion (75 g)
- 1 teaspoon garlic powder (3 g)
- 1 half teaspoon salt (3 g)
- 1 fourth teaspoon black pepper (1 g)
- 2 cups crushed cornflakes (60 g)
Instructions
- 1. Heat the Oven and Prep the Dish. Heat your oven to 350°F (175°C). Grease an 8 inch square baking dish with a little butter or cooking spray. The dish should be ready before you mix, because the creamy potato filling comes together fast.
- 2. Mix the Creamy Potato Filling. Add the thawed diced potatoes, sour cream, cream of chicken soup, shredded cheddar, 6 tablespoons of the melted butter, chopped onion, garlic powder, salt, and black pepper to a large bowl. Stir until the potatoes look evenly coated and the cheese is scattered through the mixture. The filling should look thick, creamy, and speckled with onion and cheddar. If the potatoes are very frozen, let the bowl sit for 5 minutes, then stir again so the sauce can cling to every piece.
- 3. Spread It Into the Baking Dish. Spoon the potato mixture into the prepared dish. Spread it into an even layer and press it gently into the corners. Do not pack it too tightly. A loose layer helps the casserole heat evenly and stay creamy inside.
- 4. Add the Buttered Cornflake Topping. In a small bowl, mix the crushed cornflakes with the remaining 2 tablespoons of melted butter. Stir until the flakes look lightly glossy. Scatter them over the potatoes in an even layer so every serving gets a crisp bite.
- 5. Bake Until Bubbly and Golden. Bake for 40 to 45 minutes, until the edges bubble and the cornflakes turn deep golden. The kitchen should smell buttery, cheesy, and toasty. Let the casserole rest for 5 to 10 minutes before serving so the creamy filling settles and scoops cleanly.
