overnight breakfast casserole garnished with sliced green onions and shredded cheddar cheese
American Recipes, Baking, Breakfast, Casserole

Overnight Breakfast Casserole

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This Overnight Breakfast Casserole is simple to make and perfect for Christmas morning, or anytime you want a hearty breakfast for your family. Crispy hash browns, topped with cheese, ham, bacon, eggs, and baked to a golden brown perfection. Make ahead breakfasts are perfect for holiday mornings.

overnight breakfast casserole on a serving plate garnished with green onions

This Overnight Breakfast Casserole is one of my families favorite easy breakfast casserole recipes of all time. The one thing I absolutely love about this recipe is that it can be made the night before and baked in the morning, or it can be made and baked right away. It’s a hearty breakfast that is perfect for any holiday morning, and can feed a crowd. If you love this breakfast casserole, you are going to love our Overnight French Toast Casserole and our Bacon Spinach Quiche.

Ingredients for overnight breakfast casserole

  • Frozen Shredded Hash browns: Hash browns do not need to be thawed for this recipe. Shredded hash browns with peppers can also be used.
  • Unsalted Butter: Using unsalted butter in recipes allows you to control the salt content.
  • Salt And Pepper: Use more or less if desired.
  • Shredded Cheese: This recipe calls for shredded Monterey jack cheese, but you can use cheddar if you prefer.
  • Ham: I like to use fully cooked ham that is already cut into cubes.
  • Bacon: I like to use real crumbled bacon in this recipe. You can also cook bacon and chop it if you prefer.
  • Eggs: Eggs are the main ingredients in this breakfast bake. Medium eggs work well.
  • Milk: I like to use whole milk, but you can use 1% or 2% if that’s what you have on hand.
  • Mustard Powder: Is made from ground mustard seeds, and adds a great flavor this egg bake.
  • Onion Powder: Only a small amount of onion powder is needed, but this will add great flavor.

How to make the best overnight breakfast casserole

  • Preheat oven to 400 F and spray a 9×13 baking dish with non-stick cooking spray.
  • Dump the bag of frozen hash browns into baking dish. No need to thaw.
  • Pour melted butter evenly over frozen hash browns and sprinkle with salt and pepper. Use a spoon to gently combine ingredients.
  • Bake in a preheated oven for 25 minutes, or until potatoes are tender and lightly browned on top.
  • Remove casserole dish from the oven and allow to cool slightly.
  • Sprinkle cheese evenly over casserole and add cubed ham.
  • Gently toss potatoes, cheese, and ham to combine well.
  • Sprinkle bacon bits evenly over top of casserole. Cover tightly with saran wrap and place in the fridge overnight.
  • In a large bowl whisk together eggs, milk, mustard powder, and onion powder. Cover and place in the fridge overnight.
ingredients for overnight breakfast casserole
  • When you are ready to bake, remove baking dish and egg mixture from the fridge.
  • Preheat oven to 350F
  • Pour egg mixture over casserole, making sure everything gets wet.
  • Bake in a preheated oven for 50-60 minutes or until the edges are brown and the center of the casserole is done when a fork is inserted.
  • If the edges of the casserole are getting too brown, and the center isn’t quite done, cover with aluminum foil for the remainder of the baking process.
  • Serve immediately with sliced green onions and extra shredded cheese. Enjoy!
overnight breakfast casserole garnished with sliced green onions and shredded cheddar cheese

How to bake casserole right away

  • Preheat oven to 400 F and spray a 9×13 baking dish with non-stick cooking spray.
  • Dump the bag of frozen hash browns into baking dish. No need to thaw.
  • Pour melted butter evenly over frozen hash browns and sprinkle with salt and pepper. Use a spoon to gently combine ingredients.
  • Bake in a preheated oven for 25 minutes, or until potatoes are tender and lightly browned on top.
  • Remove casserole dish from the oven and allow to cool slightly. Reduce oven temperature to 350 F.
  • Sprinkle cheese evenly over casserole and add cubed ham.
  • Gently toss potatoes, cheese, and ham to combine well.
  • In a large bowl whisk together eggs, milk, mustard powder, and onion powder.
  • Pour egg mixture evenly over top of casserole, making sure everything gets wet.
  • Sprinkle bacon bits evenly over top of casserole.
  • Bake in a preheated oven for 50-60 minutes or until the edges are brown and the center of the casserole is done when a fork is inserted.
  • If the edges of the casserole are getting too brown, and the center isn’t quite done, cover with aluminum foil for the remainder of the baking process.
  • Serve immediately with sliced green onions and extra shredded cheese. Enjoy!
overnight breakfast casserole in a serving dish garnished with sliced green onions and cheddar cheese

Helpful tips for making overnight casserole

  • You can substitute ground turkey, ground sausage, or pork sausage for the cubed ham or bacon bits.
  • This casserole can be made vegetarian but substituting sautéed vegetables for the meat. A combination of red, yellow, and green pepper, mushrooms, and onions are a great option.
overnight breakfast casserole on a serving plate garnished with chopped green onions

Overnight Breakfast Casserole

April
This Overnight Breakfast Casserole is simple to make and perfect for Christmas morning, or anytime you want a hearty breakfast for your family. Crispy hash browns, topped with cheese, ham, bacon, eggs, and baked to a golden brown perfection. Make ahead breakfasts are perfect for holiday mornings.
5 from 10 votes
Prep Time 25 mins
Cook Time 1 hr
Total Time 1 hr 25 mins
Course Breakfast
Cuisine American
Servings 8
Calories 396 kcal

Ingredients
  

  • 1 30 oz. package frozen shredded hash browns
  • 1/2 cup unsalted butter, melted
  • 1 tsp. salt
  • 1 tsp. black pepper
  • 3 cups Monterey jack cheese, shredded
  • 2 cups ham, cut into cubes
  • 1 cup real bacon bits
  • 8 eggs
  • 1 1/3 cup milk
  • 1/4 tsp. dry mustard powder
  • 1/4 tsp. onion powder

Instructions
 

  • Preheat oven to 400 F and spray a 9×13 baking dish with non-stick cooking spray.
  • Dump the bag of frozen hash browns into baking dish. No need to thaw.
  • Pour melted butter evenly over frozen hashbrowns and sprinkle with salt and pepper. Use a spoon to gently combine ingredients.
  • Bake in a preheated oven for 25 minutes, or until potatoes are tender and lightly browned on top.
  • Remove casserole dish from the oven and allow to cool slightly.
  • Sprinkle cheese evenly over casserole and add cubed ham. Gently toss potatoes, cheese, and ham to combine well.
  • Sprinkle bacon bits evenly over top of casserole. Cover tightly with saran wrap and place in the fridge overnight.
  • In a large bowl whisk together eggs, milk, mustard powder, and onion powder. Cover and place in the fridge overnight.
  • In the morning when you are ready to bake, Remove baking dish and egg mixture from the fridge. Preheat oven to 350F.
  • Pour egg mixture over casserole, making sure everything gets wet.
  • Bake in a preheated oven for 50-60 minutes or until the edges are brown and the center of the casserole is done when a fork is inserted. If the edges of the casserole are getting to brown, and the center isn't quite done, cover with aluminum foil for the remainder of the baking process.
  • Serve immediately with sliced green onions and extra shredded cheese. Enjoy!

INSTRUCTIONS IF BAKING RIGHT AWAY

  • Preheat oven to 400 F and spray a 9×13 baking dish with non-stick cooking spray.
  • Dump the bag of frozen hashbrowns into baking dish. No need to thaw.
  • Pour melted butter evenly over frozen hash browns and sprinkle with salt and pepper. Use a spoon to gently combine ingredients.
  • Bake in a preheated oven for 25 minutes, or until potatoes are tender and lightly browned on top.
  • Remove casserole dish from the oven and allow to cool slightly. Reduce oven temperature to 350 F.
  • Sprinkle cheese evenly over casserole and add cubed ham. Gently toss potatoes, cheese, and ham to combine well.
  • In a large bowl whisk together eggs, milk, mustard powder, and onion powder.
  • Pour egg mixture evenly over top of casserole, making sure everything gets wet. Sprinkle bacon bits evenly over top of casserole.
  • Bake in a preheated oven for 50-60 minutes or until the edges are brown and the center of the casserole is done when a fork is inserted. If the edges of the casserole are getting to brown, and the center isn't quite done, cover with aluminum foil for the remainder of the baking process.
  • Serve immediately with sliced green onions and extra shredded cheese. Enjoy!

Notes

*Nutrition Disclaimer: All information presented on this site is intended for informational purposes only. Nutrition facts are an estimate and not guaranteed to be accurate. I am not a certified nutritionist and any nutritional information shared on Modernmealmakeover.com should only be used as a general guideline.

Nutrition

Calories: 396kcalCarbohydrates: 17.2gProtein: 25.8gFat: 24.5gSaturated Fat: 12.9gCholesterol: 201mgSodium: 798mgPotassium: 346.2mgFiber: 1.7gSugar: 1.9gVitamin A: 16.1IUVitamin C: 5.5mgCalcium: 25.2mgIron: 3.7mg
Keyword Overnight Breakfast Bake, Overnight Breakfast Casserole
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12 Comments

  1. 5 stars
    We love this breakfast casserole for busy mornings and holidays. It’s perfect for the whole family!

  2. 5 stars
    I am more of a hot savory breakfast type-of-person so this breakfast casserole is right up my alley! So yummy!

  3. 5 stars
    Thank you so much for providing both options. This is a definitely a fuss free breakfast. What a way to enjoy a great meal with family.

  4. 5 stars
    I love breakfast casseroles, especially all the hash browns. This is such a great way to feed a large family!

  5. 5 stars
    Perfect for our Christmas breakfast. We’ve been looking for something special to have that day, and this is going to work out great!

  6. 5 stars
    Would love to wake up to this casserole on Christmas morning! So perfect that it is prepared ahead of time and those flavors sound incredible.

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