This slow cooker breakfast casserole is a cozy way to start your day. Packed with eggs, cheese, and your choice of veggies or meats, it’s both hearty and tasty!
What’s awesome is you can prep it the night before and let it cook while you snooze! I love waking up to that delicious smell wafting through the house. It’s like a breakfast hug! 🥚❤️
Key Ingredients & Substitutions
Breakfast Sausage: A delicious base for this casserole. If you prefer, turkey sausage or veggie sausage is a great health-conscious option. I often use a spicy sausage for an added kick!
Eggs: Large eggs are standard here, but egg whites can be used for a lighter version. Just remember to adjust the cooking time slightly, as they may set faster.
Cheddar Cheese: Cheddar gives a classic flavor. You can try Monterey Jack, Colby, or even a mix for different tastes. For a dairy-free option, use plant-based cheese. I’m a big fan of sharp cheddar to really make it pop!
Bacon: Cooked bacon adds crunch and flavor. If you’re looking for a healthier alternative, you might consider turkey bacon or even leave it out for a vegetarian dish.
Veggies: Red bell peppers and onions add flavor and color. Feel free to substitute with any veggies you have on hand, like spinach, zucchini, or even broccoli. I love adding spinach for extra nutrition!
How Do I Ensure My Casserole Is Cooked Perfectly?
Cooking in a slow cooker is all about patience and timing. Here are some tips for success:
- Spray the slow cooker well to prevent sticking.
- Whisk the eggs and milk thoroughly to ensure they blend evenly with other ingredients.
- Layer ingredients for even cooking; it helps if you distribute the sausage and veggies throughout.
- Check at the lower end of cooking times to avoid overcooking, especially if using high. The eggs should be set but not dry.
- Add cheese and bacon for the last 10 minutes to keep them fresh and melty!
Following these tips will help you whip up a tasty and perfectly cooked casserole that everyone will love!

How to Make a Delicious Slow Cooker Breakfast Casserole
Ingredients You’ll Need:
For the Casserole:
- 1 lb breakfast sausage, cooked and crumbled
- 8 large eggs
- 1 cup whole milk
- 2 cups shredded cheddar cheese, divided
- 1 cup diced red bell pepper
- 1 cup diced onion
- 1/2 cup diced mushrooms (optional)
- 1/4 cup chopped fresh parsley (plus extra for garnish)
- 6 slices bacon, cooked and chopped
- Salt and pepper to taste
- Non-stick cooking spray for slow cooker
Time Needed:
This scrumptious breakfast casserole takes about 15 minutes to prep and then cooks in the slow cooker for 6-8 hours on low or 3-4 hours on high. Perfect for lazy mornings or when you need a tasty meal ready when you wake up!
Step-by-Step Instructions:
1. Prepare Your Slow Cooker:
Start by spraying the inside of your slow cooker with non-stick cooking spray. This will help prevent sticking and make cleanup a breeze!
2. Mix the Egg Base:
In a large bowl, whisk together the eggs and milk until they are fully combined. This is satisfying and makes the eggs nice and fluffy!
3. Add Flavorful Ingredients:
Stir in the cooked sausage, 1 cup of the shredded cheddar cheese, diced red bell pepper, onion, mushrooms (if you’re using them), chopped parsley, and a sprinkle of salt and pepper. Give it a good mix so everything is nicely incorporated!
4. Pour it Into the Slow Cooker:
Carefully pour the egg mixture into your prepared slow cooker. Spread it out evenly so it cooks uniformly.
5. Cook It Up:
Cover the slow cooker and cook on low for 6-8 hours or on high for 3-4 hours. You’ll know it’s ready when the eggs are set, and the casserole is firm in the center.
6. Add the Finishing Touches:
About 10 minutes before serving, sprinkle the remaining 1 cup of cheddar cheese and the chopped bacon on top of the casserole. Cover it again for a few minutes to let the cheese melt deliciously!
7. Garnish and Serve:
Before you dig in, sprinkle a bit more chopped parsley on top for a fresh touch. Cut into slices and serve warm. Enjoy your hearty, flavorful breakfast with family and friends!
And there you go! Your rich and satisfying slow cooker breakfast casserole is ready to impress. The combination of fluffy eggs, savory sausage, smoky bacon, melty cheese, and colorful veggies makes for a breakfast treat that everyone will love. Enjoy! 🍽️
Can I Use Different Types of Meat in This Casserole?
Absolutely! You can substitute the breakfast sausage with turkey sausage, chicken sausage, or even omit the meat entirely for a vegetarian option. Just keep in mind that the flavors and textures might change slightly based on what you choose.
How Should I Store Leftovers?
Leftovers can be stored in an airtight container in the refrigerator for up to 3 days. For best results when reheating, warm them in the microwave or oven until heated through, adding a splash of milk if necessary to keep it moist.
Can I Prep This Casserole the Night Before?
Yes! You can prepare the egg mixture and chop the veggies ahead of time. Store it in the refrigerator and simply pour it into the slow cooker in the morning. It will make your morning routine a breeze!
Can I Make This Casserole Gluten-Free?
Yes! This recipe is naturally gluten-free as long as you use gluten-free sausage and bacon. Always double-check the labels on any pre-packaged ingredients to ensure they meet your dietary needs.



