Overnight Holiday Breakfast Casserole

Featured in Start Your Day Right.

This easy-to-make dish is a savior for busy mornings. Add layers of hash browns, cheese, and sausage to your slow cooker, pour egg mixture on top, and let it work its magic overnight. Wake up to a warm, satisfying start to your day.

Ranah
Updated on Sat, 12 Apr 2025 22:03:32 GMT
Up-close view of a golden, bubbly breakfast casserole layered with eggs, sausage, and topped with parsley. Pin it
Up-close view of a golden, bubbly breakfast casserole layered with eggs, sausage, and topped with parsley. | chefemmakitchen.com

Using my slow cooker overnight for breakfast has been a game-changer for our busy family mornings. I stack crunchy hash browns, zesty sausage and bright peppers, then dump beaten eggs on top and let the machine do its thing while we're all snoozing. Nothing beats waking up to that amazing smell and knowing there's a warm, tasty meal waiting whenever everyone rolls out of bed.

Effortless Morning Routine

This breakfast casserole started as my solution for feeding housefuls of holiday visitors. These days it's become our weekend ritual. What makes it great is how simple it is - get everything ready before bed and wake up to perfectly layered comfort cooking. Those combinations of crunchy potatoes, flavorful sausage and gooey cheese always bring happy faces to our sleepy household.

Ingredients List

  • Sausage: A pound of breakfast sausage you love, sometimes I grab turkey for something lighter
  • Hash Browns: One large bag frozen ones, they get wonderfully crispy
  • Peppers: Green and red ones add beautiful colors and wonderful sweetness
  • Onion: A single yellow onion chopped into tiny bits
  • Cheese: Lots of pepper jack for that perfect little kick
  • Eggs: Twelve eggs make it super satisfying and rich
  • Milk: Just a splash to keep those eggs nice and fluffy
  • Seasonings: Basic salt and pepper works great
  • Extra Options: Green chiles or fresh cilantro make nice additions
A close-up of a baked dish featuring a creamy mixture topped with crispy bacon and melted cheese. Pin it
A close-up of a baked dish featuring a creamy mixture topped with crispy bacon and melted cheese. | chefemmakitchen.com

Evening Prep Steps

Prep Your Stuff
Cook the sausage, dice your veggies and give that slow cooker a good coating of spray
Stack Everything Up
Begin with hash browns and then add sausage, veggies and cheese in three layers
Add The Egg Mix
Beat those eggs with milk and spices then pour over everything
Time To Sleep
Turn it on low and let it cook overnight
Breakfast Time
Let it firm up a few minutes before serving

Custom Touches

Some days I swap out for crunchy bacon or use tater tots instead of hash browns. Friends who love heat add more green chiles while others keep it tame. Adding fresh cilantro and pico de gallo transforms it with Mexican flavors. A side of fresh fruit rounds out the meal perfectly.

Storage Tips

The leftovers stay yummy for several days in the fridge. I usually make more than needed so I can freeze single portions for crazy weekday mornings. Even after three months in the freezer, it tastes nearly fresh, especially after warming it up quickly.

Pro Tips

Don't forget to spray that slow cooker really well because eggs stick like crazy. Make sure you drain the sausage thoroughly and spread each layer evenly. I sometimes finish it under the broiler for an extra crispy top, but you've gotta watch it carefully.

Frequently Asked Questions

→ Can it be prepped a day ahead?

Definitely! Place everything except the eggs in the slow cooker, cover, and refrigerate. Add the eggs in the morning before turning it on.

→ Why use fresh cheese instead of packaged shredded cheese?

Freshly shredded cheese melts better because pre-packaged ones often have additives that can stop it from melting properly.

→ Can I switch up the cheese variety?

Absolutely! Use cheeses like cheddar, colby, or monterey jack to get the best melting results. Mix them up if you'd like.

→ Why keep the slow cooker covered during cooking?

If you open the lid, heat and steam escape, which can make the dish watery and slow down cooking. It’s best to let it cook untouched.

→ Can this be baked in the oven?

Of course! Use a 9x13 pan and bake at 350°F for 45–60 minutes. If the top gets too browned, cover with foil to fix it.

Holiday Brunch Casserole

Toss hash browns, sausage, and cheese into your slow cooker, pour eggs over, and sleep peacefully while it cooks into a perfect morning meal.

Prep Time
10 Minutes
Cook Time
480 Minutes
Total Time
490 Minutes
By: emma

Category: Breakfast

Difficulty: Easy

Cuisine: American

Yield: 10 Servings (1)

Dietary: Gluten-Free

Ingredients

01 2 pounds of frozen hash browns.
02 1 cup milk or use half-and-half.
03 12 big eggs.
04 ½ cup bell peppers (red and green), chopped small.
05 ½ cup chopped onions.
06 1 teaspoon kosher salt.
07 1 pound of cooked breakfast sausage (crumbled).
08 ½ teaspoon ground black pepper.
09 1½ cups of shredded cheddar.
10 1½ cups of freshly shredded pepper jack cheese.

Instructions

Step 01

Coat the inside of the slow cooker with spray oil.

Step 02

In one bowl, toss the pepper jack and cheddar cheeses together.

Step 03

Mix the cooked sausage with the onions and diced peppers in a separate bowl.

Step 04

Crack eggs into a big bowl and beat them until smooth. Mix in milk, salt, and pepper.

Step 05

Add a third of the hash browns to the bottom, spread a third of the sausage mix on top, then sprinkle 1 cup of the cheese. Repeat 2 more times, finishing with cheese as the top layer.

Step 06

Pour the egg mixture evenly over all the layers.

Step 07

Secure the lid and cook on low for 8 hours.

Notes

  1. Shred your own cheese—it melts better!
  2. Keep the lid on the entire time it’s cooking.
  3. You can layer everything the night before, then just add eggs in the morning.
  4. Great for mornings when you want something special!

Tools You'll Need

  • A slow cooker.

Allergy Information

Please check ingredients for potential allergens and consult a health professional if in doubt.
  • Contains eggs.
  • Has milk and cheese (dairy).

Nutrition Facts (Per Serving)

It is important to consider this information as approximate and not to use it as definitive health advice.
  • Calories: 465
  • Total Fat: 32 g
  • Total Carbohydrate: 28 g
  • Protein: 24 g