This easy egg breakfast casserole is hearty, cheesy, and perfect for feeding a crowd.
With layers of bread, sausage, and eggs, it’s a make-ahead dish that’s simple yet satisfying.
Why You’ll Love This Recipe
It’s a family-friendly breakfast that works for holidays, weekends, or brunch.
You can prep it the night before and bake in the morning.
Hearty bread soaks up the egg mixture, while sausage and cheddar add flavor.
It bakes in one dish, making cleanup easy.
What You’ll Need (Ingredient Highlights)
Breakfast sausage gives the casserole a savory, meaty base.
Sturdy bread slices absorb the eggs and create structure.
Eggs and milk form a fluffy custard-like layer.
Cheddar cheese adds melty, cheesy richness.
A hint of mustard enhances flavor without overpowering.
Pro Tips Before You Start
Use day-old bread—it holds up better to the egg mixture.
Shred your own cheese for better melting and flavor.
Let the casserole rest 5–10 minutes after baking so it sets.
Prep ahead: assemble the night before, cover, and refrigerate until baking.
How to Make Easy Egg Breakfast Casserole
Step 1 – Cook the sausage
Brown sausage in a skillet over medium heat until fully cooked.
Drain and set aside.
Step 2 – Layer the bread
Grease a 9×13-inch baking dish.
Arrange bread slices in 2–3 layers, tearing as needed to fit.
Step 3 – Add the sausage
Spread the cooled sausage evenly over the bread layer.
Step 4 – Mix the eggs
Whisk eggs in a large bowl.
Add milk, mustard, salt, and pepper, and whisk until smooth.
Step 5 – Add cheese to the mixture
Stir in 1 cup of shredded cheddar.
Step 6 – Assemble the casserole
Pour egg mixture evenly over bread and sausage.
Sprinkle with remaining cheese.
Step 7 – Bake until golden
Bake at 350°F (176°C) for about 45 minutes, until the casserole is cooked through and set.
Step 8 – Garnish and serve
Top with sliced green onions or chives before serving.
What to Serve Them With
Serve with fresh fruit or a simple green salad.
Pair with orange juice or hot coffee for a complete breakfast.
Add hash browns or roasted potatoes for a heartier meal.
Variations / Substitutions
Swap sausage for bacon, ham, or turkey sausage.
Add bell peppers, mushrooms, or spinach for extra veggies.
Try Swiss, mozzarella, or pepper jack cheese instead of cheddar.
Use croissants or brioche for a richer texture.
Storage & Leftovers
Refrigerate leftovers in an airtight container for up to 4 days.
Reheat slices in the oven or microwave until warmed through.
Freeze baked casserole portions for up to 2 months; thaw overnight before reheating.
FAQs
Can I make this ahead of time?
Yes, assemble the casserole, cover, and refrigerate overnight. Bake in the morning.
Do I have to use mustard?
No, but it adds a subtle depth of flavor.
What type of bread works best?
Hearty sandwich bread, French bread, or sourdough hold up well.
How do I know when it’s done baking?
The center should be set and a knife inserted comes out clean.
Can I make it vegetarian?
Yes, just omit sausage or replace it with sautéed veggies.
Final Thoughts
This easy egg breakfast casserole is a classic crowd-pleaser.
It’s warm, cheesy, and comforting—perfect for family gatherings, meal prep, or lazy weekends.
Easy Egg Breakfast Casserole
Ingredients
Method
- Cook sausage in a skillet until browned and cooked through. Drain.
- Grease a 9x13-inch baking dish. Layer bread slices inside.
- Spread sausage over bread.
- In a bowl, whisk eggs, milk, mustard, salt, and pepper.
- Stir in 1 cup cheese.
- Pour mixture over bread and sausage. Top with remaining cheese.
- See full steps with tips & photos → https://theboatshedcafe.com/easy-egg-breakfast-casserole/
Notes
- You can prep this the night before, refrigerate, and bake in the morning.
- Swap cheddar for mozzarella, pepper jack, or Swiss for different flavors.
- Add veggies like bell peppers, mushrooms, or spinach for extra nutrition.
My name is Isabella, and this space was born from years of stirring sauces at sunset, baking cookies while the kids played on the porch, and finding comfort in a homemade meal after long, busy days. Here you’ll find delicious, reliable recipes made with simple ingredients, plus easy step-by-step photos and videos to help you cook confidently at home.