Crockpot Breakfast Casserole
Our Crockpot Breakfast Casserole recipe takes a classic breakfast casserole and turns it into a convenient and easy to make crockpot recipe. Filled with ground sausage, fresh veggies like bell peppers and onions, and melty cheese, this will satisfy even your most picky eaters!

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This delicious breakfast, with its hints of red and green is actually the perfect way to start your Christmas morning! This easy breakfast is one of our favorite breakfast ideas any time of the year, though, but it's best served when you need a tasty dish that'll feed the whole family but you don't want to get up at the crack of dawn to do it.
Waking up to a full homemade meal from scratch is the best part about overnight breakfast recipes. With a cooking time of about 5-6 hours, it's the best way to ensure you have a fully cooked breakfast for you when you wake up.
There's plenty of ways to make this breakfast casserole perfect for you and your family. There are a ton of options for add-ins like spinach, mushrooms, zucchini, or even green chiles if you want some spice. Top it off with a dollop of sour cream, salsa, or Pico de Gallo.
Why You'll Love This Recipe:
Effortless breakfast: The crockpot does all the work, just assemble, set, and forget until morning.
Perfect for gatherings: Serves a crowd and keeps warm, making it ideal for holidays or brunch.
Customizable: Add vegetables, switch up the cheese, or include bacon or ham for extra flavor.
Meal prep friendly: Easy to portion and reheat for quick weekday breakfasts.
Comforting and hearty: A warm, savory breakfast loaded with sausage, cheese, and eggs that satisfies every time.
Ingredients to Make Crockpot Breakfast Casserole:
- breakfast sausage. Adds rich, savory flavor. You can use pork, chicken, or turkey sausage, just make sure it's fully cooked and crumbled before layering.
- onion. Provides depth and sweetness. Yellow or white onions work best, but you can use green onions for a milder flavor.
- red bell pepper. Brings color and a touch of sweetness. Swap for green, yellow, or orange peppers if preferred.
- eggs. The base of the casserole, use fresh large eggs for the best texture and flavor.
- milk. Keeps the eggs light and fluffy. Any milk works, from whole to unsweetened almond milk.
- salt & pepper. Simple seasoning that enhances the overall flavor without overpowering the other ingredients.
- cheddar cheese. Melts perfectly and gives a classic breakfast taste. You can substitute with Monterey Jack, Colby, or mozzarella for a different flavor profile.

How to Make Crockpot Breakfast Casserole:
- In a skillet over medium heat, cook the sausage and onion together until the sausage is browned and the onion is tender. Drain excess grease.
- Lightly grease the inside of your crockpot.
- Spread the cooked sausage and onion mixture evenly on the bottom.
- Add the diced red bell pepper and 1 ½ cups of the shredded cheddar cheese on top.
- In a large bowl, whisk together the eggs, milk, salt, and pepper. Pour the egg mixture evenly over the ingredients in the crockpot.
- Sprinkle the remaining ½ cup of cheese on top.
- Cover and cook on Low for 6-8 hours or High for 3-4 hours, until the eggs are set in the center.
- Let rest for 5-10 minutes before slicing and serving.

Recipe Notes & Tips:
- Make ahead: Assemble the casserole the night before, cover, and refrigerate overnight. In the morning, simply place the insert into the crockpot and cook as directed.
- Grease well: Be sure to grease the crockpot generously so the eggs don't stick to the sides.
- Avoid over cooking: Check for doneness around the 6-hour mark on Low, overcooked eggs can become rubbery.
- Add-ins: Mix in vegetables like spinach, mushrooms, zucchini, or diced tomatoes for added flavor and nutrition.
- Cheese tip: Freshly shredded cheese melts smoother and gives a creamier texture compared to pre-shredded.
- Meat variations: Swap sausage for cooked bacon, ham, or a mix of proteins to change up the flavor.
- For extra flavor: Add a pinch of garlic powder, paprika, or Italian seasoning to the egg mixture.
- Serving suggestion: Top with salsa, green onions, or a drizzle of hot sauce for extra flavor.

Serving Suggestions:
How to Store:
Refrigerator: Store leftovers in an airtight container for up to 4 days. Let the casserole cool completely before refrigerating to prevent condensation and sogginess.
Freezer: Slice into individual portions, wrap each piece tightly in plastic wrap or foil, and store in a freezer-safe bag for up to 2 months.
Reheating: Reheat larger portions in a covered baking dish at 350°F for 15-20 minutes until heated through.

FAQs:
Yes, you can layer 2-3 cups of frozen hash browns at the bottom of the crockpot before adding the sausage mixture for a heartier casserole.
Absolutely, just skip the sausage and add extra vegetables like mushrooms, spinach, or diced zucchini for texture and flavor.
You can replace up to half of the whole eggs with egg whites to reduce fat and cholesterol while keeping the texture soft and fluffy.

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Crockpot Breakfast Casserole
Ingredients
Instructions
- In a skillet over medium heat, cook the sausage and onion together until the sausage is browned and the onion is tender. Drain excess grease.
- Lightly grease the inside of your crockpot.
- Spread the cooked sausage and onion mixture evenly on the bottom.
- Add the diced red bell pepper and 1 ½ cups of the shredded cheddar cheese on top.
- In a large bowl, whisk together the eggs, milk, salt, and pepper. Pour the egg mixture evenly over the ingredients in the crockpot.
- Sprinkle the remaining ½ cup of cheese on top.
- Cover and cook on Low for 6-8 hours or High for 3-4 hours, until the eggs are set in the center.
- Let rest for 5-10 minutes before slicing and serving.
Nutrition
Notes
- Make ahead: Assemble the casserole the night before, cover, and refrigerate overnight. In the morning, simply place the insert into the crockpot and cook as directed.
- Grease well: Be sure to grease the crockpot generously so the eggs don't stick to the sides.
- Avoid over cooking: Check for doneness around the 6-hour mark on Low, overcooked eggs can become rubbery.
- Add-ins: Mix in vegetables like spinach, mushrooms, zucchini, or diced tomatoes for added flavor and nutrition.
- Cheese tip: Freshly shredded cheese melts smoother and gives a creamier texture compared to pre-shredded.
- Meat variations: Swap sausage for cooked bacon, ham, or a mix of proteins to change up the flavor.
- For extra flavor: Add a pinch of garlic powder, paprika, or Italian seasoning to the egg mixture.
- Serving suggestion: Top with salsa, green onions, or a drizzle of hot sauce for extra flavor.
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Waking up Christmas morning and having a delicious breakfast already made makes me just as excited as the kids. If you've ever slaved away in the kitchen while the kids open up their presents you'll love this.