This hearty sausage breakfast casserole is a great way to start your day! Packed with tasty sausage, eggs, and cheese, it’s warm and filling.
It’s perfect for brunch with friends or a cozy family morning. I love making it the night before, so all I have to do is pop it in the oven in the morning—easy peasy!
Key Ingredients & Substitutions
Breakfast Sausage: The star of this dish! I love using spicy sausage for a bit of kick, but you can use mild sausage or turkey sausage if you prefer something lighter or less spicy.
Eggs: Fresh large eggs are the best for this casserole, making it fluffy and rich. You can substitute egg whites or a vegan egg alternative if you’re looking for a lighter or plant-based option.
Milk: I stick with whole milk for creaminess, but feel free to use 2% milk or even almond or oat milk for a non-dairy version. Just keep in mind that the texture might change slightly.
Cheddar Cheese: Cheddar is my go-to for its sharp flavor and meltability. Mixing it with Monterey Jack or using a blend can give it a unique taste. For a lower-fat option, reduced-fat cheese works well, too.
Bread: French or Italian bread adds a nice texture, but you can use whole grain or even gluten-free bread. Stale bread works great since it absorbs the egg mixture better.
How Do I Ensure My Casserole Sets Perfectly?
Getting the right texture for your breakfast casserole is key! Here are some tips:
- Make sure to whisk the eggs and milk well for a smooth mixture.
- The bread should be cubed evenly to allow for better soaking. Let it sit in the egg mixture for a few minutes before baking to absorb as much liquid as possible.
- Check for doneness by inserting a knife into the center; it should come out clean when fully baked.
- Let the casserole sit for a few minutes after baking—this helps it firm up, making it easier to slice!

Pioneer Woman Sausage Breakfast Casserole
Ingredients You’ll Need:
For the Casserole:
- 1 pound breakfast sausage
- 6 large eggs
- 1 cup milk
- 2 cups shredded cheddar cheese, divided
- 4 cups cubed bread (like French or Italian bread)
- 1/2 cup chopped red bell pepper
- Salt and pepper to taste
For the Garnish:
- 1/4 cup chopped green onions or parsley
For Preparation:
- Butter or cooking spray for greasing the baking dish
How Much Time Will You Need?
This delicious casserole will take about 15 minutes to prep, and then you’ll bake it for 35 to 45 minutes. Altogether, you’ll need about 1 hour to have it ready from start to finish. Perfect for brunch or breakfast gatherings!
Step-by-Step Instructions:
1. Prepping the Oven and Dish:
Start by preheating your oven to 350°F (175°C). While that’s heating up, take a 9×13 inch baking dish and grease it well with butter or cooking spray. This will help prevent sticking and make cleanup easier.
2. Cooking the Sausage:
In a skillet over medium heat, add the breakfast sausage. Cook it until it’s fully browned and crumbly—this should take about 5 to 7 minutes. Once done, drain any excess grease and set the sausage aside in a bowl.
3. Mixing the Casserole Base:
In a large bowl, crack the eggs and pour in the milk. Sprinkle in some salt and pepper, then whisk them together until well combined. Next, add the cubed bread, the cooked sausage, 1 1/2 cups of the shredded cheddar cheese, and the chopped red bell pepper. Gently stir everything together until the bread is well coated with the egg mixture.
4. Assembling the Casserole:
Pour this tasty mixture into your prepared baking dish, making sure it’s evenly distributed. Now, sprinkle the remaining 1/2 cup of shredded cheddar cheese evenly over the top. This will give it a lovely cheesy crust when it bakes!
5. Baking the Casserole:
Pop the casserole into your preheated oven and bake for 35 to 45 minutes. It’s done when the casserole is set in the middle and the cheese is melted and bubbly. If you’re unsure, you can poke it with a knife; it should come out clean.
6. Finishing Touches:
Once baked, take the casserole out of the oven and let it sit for about 5 minutes. This resting time helps it firm up, making it easier to slice. Just before serving, garnish with chopped green onions or parsley to add a fresh touch.
7. Serve and Enjoy!
Your savory sausage breakfast casserole is now ready to delight! Serve it warm with your favorite breakfast sides like fruit, bacon, or toast, and enjoy every bite!
Can I Use Different Types of Bread?
Absolutely! While French or Italian bread works great, you can also use whole grain, sourdough, or even gluten-free bread. Just ensure the bread is sturdy enough to hold up in the casserole!
How Can I Make This Casserole Vegetarian?
You can substitute the breakfast sausage with a plant-based sausage or simply omit it altogether. You might also want to add in some sautéed veggies like spinach or mushrooms for added flavor and texture.
Can I Prepare This Casserole Ahead of Time?
Yes! You can assemble the casserole the night before and refrigerate it overnight. Just be sure to cover it with plastic wrap. Then, pop it in the oven directly from the fridge, adding a few extra minutes to the bake time!
What’s the Best Way to Store Leftovers?
Store any leftovers in an airtight container in the fridge for up to 3 days. To reheat, warm it gently in the microwave or oven. If reheating in the oven, cover it loosely with foil to prevent drying out.



