Cheesy Hash Brown Casserole in a glass baking dish on top of a white and grey towel with a spoon pulling out a scoop (with logo overlay)

Cheesy Hash Brown Casserole

What’s your favorite breakfast-for-dinner meal? Cheesy Hash Brown Casserole is a great meal for breakfast or dinner, combining two of my favorite ingredients…. potatoes and cheddar cheese!

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Cheesy Hash Brown Casserole comes straight from the 100 Days of Real Food book. It is a mixture of two of my favorite things…. potatoes and cheddar cheese!

This is super-simple to make, especially if you use frozen hashbrowns. And trust me, buy them frozen. I tried with homemade hash browns one time and it just didn’t work very well. I couldn’t get all of the moisture out of the potatoes and it was a runny mess. 

Cheesy Hash Brown Casserole is a great option if you need a recipe for a pot-luck style brunch. I made it for my Mothers of Preschoolers meeting on month and everyone was asking me for the recipe. It was a great balance to the yogurt parfaits that we had with it.

I have this listed under breakfast since most people associate hash browns as a breakfast food. But we’ve made it for dinner a few times, and it works well for either. 

Step by Step

Preheat the oven to 350F and grease a square baking dish. In a large skillet, melt the butter over medium heat then cook the diced onion for about 2-3 minutes, just until it softens. Add the minced garlic and cook for another minute. 

Large skillet with cooked onion and garlic next to stainless steel mixing bowls of flour, seasonings, and cheddar cheese and a glass measuring cup with cream all on a brown wooden surface

Turn the heat down to medium-low and slowly whisk in the flour while stirring continuously. Whisk in the milk, salt, and pepper and stir until it thickens in the flour, about 2-3 minutes. 

Large skillet with cream mixture next to a stainless steel bowl of shredded cheddar cheese on a brown wooden surface

Remove the pan from the heat and add the shredded cheddar cheese. Stir continuously until the cheese has all melted. 

Large skillet with cream mixture and shredded cheddar cheese next to an empty stainless steel mixing bowl on a brown wooden surface

Fold the hash browns into the cheese mixture. If your pan is big enough, you can do it in the pan. I prefer to mix it all in a large mixing bowl to make sure I have the space needed.

Cheesy hash brown casserole mix in a large stainless steel mixing bowl next to an empty glass baking dish all on a brown wooden surface

Transfer the mixture to the greased baking dish and smooth it out as much as possible. 

Glass baking dish with uncooked cheesy hash brown casserole inside on a brown wooden surface

Bake the casserole for about 30-35 minutes, uncovered. The cheese should start to bubble but probably won’t be brown. If you want to brown the cheese, you can turn the broiler on for a few minutes. 

Cheesy Hash Brown Casserole in a glass baking dish on top of a white and grey towel with a spoon pulling out a scoop (vertical)


Originally Published On: February 11, 2017

Last Updated On: November 2, 2019

Cheesy Hash Brown Casserole in a glass baking dish on top of a white and grey towel with a spoon pulling out a scoop

Cheesy Hash Brown Casserole

Cheesy Hash Brown Casserole is a great meal for breakfast or dinner, combining two of my favorite ingredients… potatoes and cheddar cheese!
Prep Time 15 minutes
Cook Time 30 minutes
Total Time 45 minutes
Servings: 8 cups
5 from 8 votes


  • 6 tbsp butter
  • 1/3 cup onion (diced)
  • 1 clove garlic (minced)
  • 4 tbsp all-purpose flour
  • 1 1/2 cups milk
  • 1/2 tsp salt
  • 1 tsp pepper
  • 2 cups mild cheddar cheese (freshly grated)
  • 1 pound hash browns (frozen)


  • Preheat oven to 350F
  • Grease a square baking dish
  • In large pan, melt butter over medium heat
  • Add the diced onion and cook until it softens, about 2-3 minutes
  • Add the minced garlic for another minute
  • Turn heat to medium-low and whisk in flour slowly, stirring continuously
  • Whisk in milk, salt, and pepper until it thickens
  • Turn off the heat and add the grated cheese until it melts
  • Fold cheese mixture with hash browns until it is completely coated
  • Transfer to the baking dish, making sure to really pat the mixture down into the pan
  • Bake about 30-35 minutes uncovered
  • Turn heat to brown for a few minutes to brown the top, if desired
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Nutrition Facts
Cheesy Hash Brown Casserole
Amount Per Serving (1 cup)
Calories 282 Calories from Fat 180
% Daily Value*
Fat 20g31%
Saturated Fat 12g60%
Cholesterol 57mg19%
Sodium 429mg18%
Potassium 259mg7%
Carbohydrates 16g5%
Fiber 1g4%
Sugar 3g3%
Protein 10g20%
Vitamin A 623IU12%
Vitamin C 5mg6%
Calcium 265mg27%
Iron 1mg6%
* Percent Daily Values are based on a 2000 calorie diet.

All nutritional information is based on third-party calculations and should be considered estimates. Actual nutrition content will vary based on brands used, measuring methods, portion sizes, and more.

50 thoughts on “Cheesy Hash Brown Casserole”

  1. 5 stars
    girl you are KILLING me with this recipe! cheddar and potatoes- same for me! I love potatoes too much but this looks divine! I made one once that I lost the recipe of that was cream of mushroom based and sour cream infused- so good! But i also used cubed instead because i grabbed it by mistake!

  2. 5 stars
    This looks perfect for brunch! So bright and comforting! I have guests coming over next week and I was wondering what to make, this will definitely make my life easier that day! Thank you for always providing so much food inspo!!

  3. You had me at “cheesy.” Lol. This looks so delicious! Perfect for a weekend breakfast. Can’t wait to eat the carby goodness!

  4. We have a recipe that is similar to this that’s been in my family for years and it is ALWAYS A huge hit at potlucks and events! I love that you cook up your onions first, I am going to start doing that with mine <3

  5. I love cheese and hash brown! Hash brown is one of my favorites for breakfast. This cheesy hash brown casserole sounds like an amazing recipe. would love to try this!

  6. 5 stars
    I am always looking for good casserole dishes over the cold months. This one looks tasty and my family loves hashbrowns! Thanks for this recipe!

  7. Oooooo so yum!!!! This reminds me of one of my favorite side dishes from cracker barrle. So need to make this for the family sometime

  8. 5 stars
    It has been a long time since I had hash browns (they don’t have it as morning staple in Japan). I would so make this just to experience the taste of hash browns.

  9. Oh my gosh this is the best of both worlds a casserole and cheese. Will be giving this a go at the weekend. What a fab dish xx

    1. I personally haven’t tried that yet, but I think if you were to do all of the steps up to baking, then refrigerate and bake in the morning, it should work. If you bake it then save, it may cook too much to cook the entire casserole again in the morning.

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