Cheesy Hash Brown Casserole

Featured in: Sweet Comfort Bakes

This cheesy hash brown casserole combines thawed frozen potatoes, sharp cheddar, sour cream, milk, and aromatics into a creamy mixture. Topped with buttery crushed cornflakes, it bakes until golden and bubbling in a 9x13-inch dish. With minimal prep, this classic American comfort side delivers rich flavor and satisfying texture—perfect for holidays or casual dinners. The baking process melds dairy, potatoes, and onion with hints of garlic, and the topping adds irresistible crunch. Serve warm after resting to ensure a moist interior and crispy top.

Updated on Sun, 15 Mar 2026 12:22:00 GMT
A golden-baked Cheesy Hash Brown Casserole with crispy cornflake topping, served hot from the oven. Save to Pinterest
A golden-baked Cheesy Hash Brown Casserole with crispy cornflake topping, served hot from the oven. | lovelyserena.com

Steam rose in billows one chilly spring morning as I slid a bubbling Cheesy Hash Brown Casserole from the oven& and the scent of melting butter and cheddar instantly filled the kitchen& I barely noticed family gathering& drawn by that irresistible aroma& The magic happens every time& and it always surprises me how such humble ingredients transform into a creamy crowd-pleaser& One day we finished the last spoonful right from the pan& unable to resist the golden crust&

I once made this casserole for our Easter brunch& and everyone crowded around the stove debating who would get the corner piece& Someone spilled a little milk& sparking laughter and a quick mop-up— nothing slowed us down& That morning& I learned casseroles create conversation as much as comfort&

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Ingredients

  • Frozen hash browns: Thaw them well so the casserole isn't watery& If you're prepping ahead& spread them out to dry for an hour&
  • Sharp cheddar cheese: Nothing beats the punchy flavor it adds& For perfect melting& grate it fresh if you can&
  • Sour cream: Gives the dish its signature creaminess& Don’t skip it—I've tried& and it just wasn’t the same&
  • Unsalted butter: Melted butter brings richness& Be generous for that deep golden crust&
  • Whole milk: Keeps everything moist& Use whole milk for best texture&
  • Onion: Finely chop so it melds into every bite& If you want extra zing& use scallions&
  • Garlic: Mince well& so it disappears and infuses the casserole with gentle warmth&
  • Condensed cream of mushroom soup: The secret shortcut for savory depth& Substitute with chicken soup if you like&
  • Salt and black pepper: Season every layer& Taste before baking for perfect balance&
  • Cornflakes: Lightly crush for topping& It’s a game-changer& Don’t skip this step&
  • Melted butter (for topping): Helps the cornflakes turn crispy and golden&

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Instructions

Get your oven ready:
Preheat to 350°F (175°C) and grease a 9x13-inch baking dish& The sizzling sound when the first spoonful hits the pan means you’re doing it right&
Mix your base:
Grab a large bowl and stir together hash browns& cheddar& sour cream& melted butter& milk& chopped onion& garlic& soup& salt& and pepper& It’s messy but the creamy swirl looks gorgeous&
Spread and smooth:
Pour the mix into your baking dish and press gently until it’s even& Don’t be afraid to use your hands& it’s actually easier&
Cornflake topping:
Toss crushed cornflakes with melted butter then sprinkle over the casserole& You’ll hear a satisfying crunch as you scatter them&
Bake and wait:
Bake for 45–50 minutes& until golden on top and the edges bubble& The smell should wake up anyone nearby&
Let it rest:
Give it 5–10 minutes to cool& so it slices beautifully& It’s tempting but worth the wait for perfectly cheesy squares&
Save to Pinterest
| lovelyserena.com

There was a quiet moment& right after serving& when everyone settled in and took their first bite& I looked around and realized how a simple casserole anchors a table full of conversation and laughter&

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Cornflake Topping Makes The Difference

At first& I thought cornflakes were just a quirky retro touch& but after baking& they deliver a shattering crunch that even picky eaters love& It’s worth crushing them by hand for uneven pieces— the crispy bits on top are my favorite&

Prep Smart For Easier Cleanup

If you lay out all your ingredients before starting& stir everything in one bowl& and grease your dish well& there’s no stuck-on mess at the end& I learned to let the casserole cool before slicing& so cleanup is faster&

Add-Ins And Variations I Love

Sometimes I sneak in scallions or a handful of chopped cooked bacon& and the crowd always cheers& Experiment with cream of chicken soup or pepper jack cheese for a fun twist& Mix-ins are flexible here& so let the fridge inspire you&

  • Toss in diced peppers for color&
  • Swap out onion for shallots if you’re feeling fancy&
  • Don’t forget to use extra cheese on top if you crave gooeyness&
A comforting side dish of creamy hash browns with melted cheddar, perfect for holiday dinners or potlucks. Save to Pinterest
A comforting side dish of creamy hash browns with melted cheddar, perfect for holiday dinners or potlucks. | lovelyserena.com

This casserole has turned last-minute gatherings into cozy feasts more times than I can count& I hope it brings warmth and smiles to your table too&

Ask About This Recipe

Can fresh potatoes be used instead of frozen hash browns?

Yes, grate fresh potatoes and squeeze excess moisture before mixing with other ingredients.

What alternative toppings can replace cornflakes?

Try crushed potato chips, buttered breadcrumbs, or panko for a similar crunchy finish.

Is it possible to prepare this dish ahead?

Prepare and assemble the mixture up to a day ahead, refrigerate, then add topping and bake before serving.

Can the casserole be made gluten-free?

Substitute gluten-free soup and cornflakes to adapt this casserole for gluten-sensitive diets.

How can leftovers be stored and reheated?

Store covered in the refrigerator for up to four days. Reheat in the oven for the best texture.

Are there suggested add-ins for extra flavor?

Stir in chopped scallions or crumbled cooked bacon to enhance taste and offer savory variation.

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Cheesy Hash Brown Casserole

Creamy, cheesy hash browns baked with crisp cornflakes. Ideal comfort food for festive gatherings or weeknight meals.

Prep Duration
15 minutes
Cook Duration
50 minutes
Overall Time
65 minutes
Created by Serena Moore


Skill Level Easy

Cuisine American

Makes 8 Portions

Dietary Details No Meat

What You Need

Potatoes

01 1 bag (30 oz) frozen shredded hash browns, thawed

Dairy

01 2 cups shredded sharp cheddar cheese
02 1 cup sour cream
03 1/2 cup unsalted butter, melted
04 1 cup whole milk

Aromatics

01 1 small onion, finely chopped
02 2 cloves garlic, minced

Condiments & Seasonings

01 1 can (10.5 oz) condensed cream of mushroom soup
02 1 teaspoon salt
03 1/2 teaspoon black pepper

Topping

01 1 1/2 cups cornflakes, lightly crushed
02 2 tablespoons unsalted butter, melted

How To Make It

Step 01

Prepare Oven and Baking Dish: Preheat oven to 350°F. Grease a 9x13-inch baking dish with nonstick spray or butter.

Step 02

Combine Main Components: In a large mixing bowl, combine thawed hash browns, cheddar cheese, sour cream, 1/2 cup melted butter, milk, onion, garlic, condensed cream of mushroom soup, salt, and black pepper. Mix thoroughly until evenly blended.

Step 03

Transfer Mixture: Spread the prepared mixture into the greased baking dish in an even layer.

Step 04

Prepare Topping: In a small bowl, toss crushed cornflakes with 2 tablespoons melted butter until well coated.

Step 05

Apply Topping: Sprinkle buttered cornflakes evenly across the surface of the casserole.

Step 06

Bake: Place dish in preheated oven and bake for 45 to 50 minutes, or until topping is golden and bubbling, and the center is heated through.

Step 07

Rest Before Serving: Allow casserole to rest for 5 to 10 minutes before portioning and serving.

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Tools You'll Need

  • Large mixing bowl
  • 9x13-inch baking dish
  • Small mixing bowl
  • Measuring cups and spoons
  • Spatula or large spoon

Allergy Details

Review ingredients for allergens and speak to your healthcare provider if you have concerns.
  • Contains milk, cheese, butter, and cream (dairy); contains wheat from condensed soup and possibly cornflakes. Check packaging for potential gluten and soy allergens in processed ingredients.

Nutrition per Portion

Details are for reference and aren't a substitute for expert medical guidance.
  • Energy: 340
  • Lipids: 20 g
  • Carbohydrates: 30 g
  • Proteins: 8 g

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