Welcome to the ultimate guide to the perfect Cheesy Potato Casserole. This isn’t just any recipe; it’s your new go-to for family dinners, holiday gatherings, and potlucks. We’re skipping the canned soup to create a rich, creamy, and flavorful cheese sauce from scratch that takes this classic comfort dish to a whole new level. Prepare for a bubbling, golden-brown masterpiece that everyone will rave about.
This dish is the epitome of comfort, combining tender shredded potatoes with a velvety, rich cheese sauce, all baked to perfection. It’s the kind of side dish that often steals the show, becoming the main event. Whether you’re serving it alongside a holiday roast or as a hearty weeknight meal, this casserole is pure satisfaction.
Why This Cheesy Potato Casserole is the Best
You’ll fall in love with this recipe for its simplicity and incredible flavor. The homemade cheese sauce is the star, offering a depth of flavor that canned soups simply can’t match. It’s creamy, perfectly seasoned, and oh-so-cheesy. Plus, this recipe is incredibly versatile, allowing for numerous variations to suit your taste.
- Incredibly Flavorful: The from-scratch cheese sauce made with real cheddar and simple seasonings makes all the difference.
- Simple Ingredients: You only need a handful of pantry staples to create this showstopper.
- Perfect for Any Occasion: It’s elegant enough for a holiday feast but simple enough for a Tuesday night dinner.
- Crowd-Pleasing Comfort: This is the dish that disappears first at every gathering. It’s a certified crowd-pleaser!

The Key Ingredients You’ll Need
Creating a spectacular Cheesy Potato Casserole starts with quality ingredients. Here’s what you’ll need to make the magic happen.
For the Potato Casserole:
- Potatoes: Frozen shredded hash browns are the secret to a quick prep time. No peeling or shredding required!
- Onion: Finely chopped onion adds a subtle, savory base layer of flavor.
- Sour Cream: This adds a tangy richness that balances the cheese and creates an ultra-creamy texture.
- Melted Butter: Because everything is better with butter! It adds richness and helps bind the casserole.
- Seasonings: A simple mix of garlic powder, salt, and black pepper is all you need.
For the Homemade Cheese Sauce:
- Butter & Flour: These form a roux, the classic base for thickening our creamy sauce.
- Milk: Use whole milk for the richest, creamiest results.
- Cheddar Cheese: Sharp cheddar cheese provides the best flavor. Freshly grated is a must, as it melts much smoother than pre-shredded varieties.
Step-by-Step Instructions
Making this Cheesy Potato Casserole from scratch is easier than you think. Follow these simple steps for a perfect bake every time.
- Preheat and Prep: Start by preheating your oven to 350°F (175°C) and lightly greasing a 9×13-inch baking dish.
- Combine Casserole Ingredients: In a large bowl, combine the thawed hash browns, chopped onion, sour cream, melted butter, garlic powder, salt, and pepper. Mix until everything is evenly coated.
- Make the Cheese Sauce: In a medium saucepan, melt the butter for the sauce over medium heat. Whisk in the flour and cook for one minute to form a roux. Gradually pour in the milk, whisking constantly to prevent lumps. Cook, stirring, until the sauce thickens.
- Add the Cheese: Remove the saucepan from the heat and stir in the shredded cheddar cheese until it’s completely melted and the sauce is smooth.
- Combine and Bake: Pour the cheese sauce over the potato mixture and stir gently to combine. Spread the mixture evenly into your prepared baking dish. Bake for 45-55 minutes, or until the casserole is bubbly and the top is golden brown.
Let the casserole rest for a few minutes before serving. This allows it to set up, making it easier to serve. If you’re looking for another comforting classic, our Beef and Macaroni Soup is a perfect winter warmer.

Tips for the Perfect Casserole
Want to ensure your Cheesy Potato Casserole is flawless? Here are some expert tips to guide you.
- Thaw Your Hash Browns: For the best texture, make sure your frozen hash browns are completely thawed and drained of any excess water.
- Grate Your Own Cheese: Pre-shredded cheeses are often coated in anti-caking agents that can make your sauce gritty. Grating your own ensures a silky-smooth melt.
- Don’t Overbake: Bake just until the center is hot and the edges are bubbly. Overbaking can cause the sauce to separate and become oily.
- Let It Rest: Allowing the casserole to sit for 10-15 minutes after baking helps it firm up for perfect, clean slices. It will still be plenty hot!
Variations and Add-Ins
One of the best things about this Cheesy Potato Casserole is its versatility. Feel free to get creative and make it your own!
- Add Protein: Stir in cooked, crumbled bacon, diced ham, or shredded chicken to make it a complete meal.
- Sneak in Veggies: Steamed broccoli florets or sautéed mushrooms are excellent additions.
- Spice It Up: Add a pinch of cayenne pepper or a dash of hot sauce to the cheese sauce for a little kick. For a different kind of kick, you could even try adding some of the flavors from our Calabrian Chili Pasta.
- Crunchy Topping: For extra texture, top the casserole with crushed cornflakes, panko breadcrumbs, or crispy fried onions during the last 15 minutes of baking.
What to Serve with Your Casserole
This casserole is a fantastic side dish that pairs well with almost any main course. It’s a staple for holiday meals, pairing beautifully with a Roast Turkey or glazed ham. For a weeknight dinner, serve it alongside grilled chicken, meatloaf, or pork chops. It’s also perfectly at home at a summer BBQ next to some Grilled BBQ Boneless Chicken Thighs.
Storage and Reheating Instructions
Got leftovers? Lucky you! This casserole is just as delicious the next day.
- To Store: Let the casserole cool completely, then cover it tightly with foil or transfer it to an airtight container. Refrigerate for up to 4 days.
- To Reheat: You can reheat individual portions in the microwave. For larger amounts, place the casserole in an oven-safe dish, cover with foil, and bake at 350°F (175°C) for 20-25 minutes, or until heated through.
- To Freeze: Assemble the casserole but do not bake. Cover tightly with both plastic wrap and foil. It can be frozen for up to 3 months. When ready to eat, thaw overnight in the refrigerator and bake as directed, adding 10-15 minutes to the baking time.
FAQs about Cheesy Potato Casserole
Yes, this casserole freezes well. For best results, freeze it *before* baking. Assemble the casserole in a freezer-safe dish, cover tightly with plastic wrap and then foil, and freeze for up to 3 months. Thaw overnight in the refrigerator before baking as directed.
Yes! You can assemble the entire casserole, cover it tightly, and refrigerate it for up to 2 days before baking. You may need to add 10-15 minutes to the baking time when cooking from chilled.
Absolutely. You can use about 2 pounds of Russet potatoes. Simply peel and shred them using a box grater, then squeeze out as much excess moisture as possible with a clean kitchen towel before mixing with the other ingredients.
The key is to use quality ingredients and not to overbake. Using freshly grated, full-fat cheese ensures a smooth melt without the oiliness that can come from some processed cheeses. Also, removing the casserole from the oven once it’s bubbly and golden prevents the sauce from separating and releasing excess oil.
A good melting cheese with a strong flavor is best. Sharp cheddar is a classic choice for its rich taste. You can also use a blend of cheeses like Monterey Jack, Gruyère, or Colby for more complex flavor.
The Perfect Cheesy Potato Casserole Awaits
This Cheesy Potato Casserole recipe is a true game-changer. With its rich, homemade cheese sauce and simple, wholesome ingredients, it’s destined to become a treasured recipe in your collection. We hope you love making and sharing this ultimate comfort food dish. If you do, please leave a comment below or share a photo of your creation on Pinterest!

The Recipe

Cheesy Potato Casserole: The Ultimate Comfort Food Recipe
Ingredients
Equipment
Instructions
- Preheat your oven to 350°F (175°C). Lightly grease a 9x13-inch baking dish.
- In a large bowl, mix together the thawed hash browns, chopped onion, sour cream, 1/2 cup of melted butter, garlic powder, salt, and pepper until well combined.
- In a medium saucepan over medium heat, melt the 1/4 cup of butter for the sauce. Whisk in the flour and cook for 1 minute, stirring constantly.
- Gradually pour in the milk, whisking continuously to ensure the sauce is smooth. Continue to cook, stirring frequently, until the sauce has thickened, about 5-7 minutes.
- Remove the pan from the heat. Stir in the shredded cheddar cheese until it has fully melted and the sauce is smooth and creamy.
- Pour the homemade cheese sauce over the potato mixture in the large bowl. Stir gently to combine everything. Spread the mixture evenly into the prepared baking dish.
- Bake for 45-55 minutes, or until the casserole is hot, bubbly, and the top is golden brown. Let it rest for 10-15 minutes before serving.
Notes
Grate Your Cheese: For the smoothest sauce, always grate your own cheese from a block.
Rest Before Serving: Letting the casserole rest is crucial for it to set, making it much easier to serve.