This Sausage and Egg Brunch Casserole has everything you love about a hearty breakfast, all baked in one dish. It’s savory, cheesy, and perfect for feeding a group without standing over the stove. You can assemble it the night before, then bake it fresh in the morning while you make coffee.

It also plays well with sweet brunch sides if you want a balance of flavors. For another baked brunch favorite, check out this cozy make-ahead dish: Baked Strawberries And Cream French Toast. If you prefer a savory egg bake, try this easy option too: Make Ahead Savory Brunch Egg Bake.

Sausage and Egg Brunch Casserole – A Cozy, Make-Ahead Crowd-Pleaser

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Prep Time 20 minutes mins

Cook Time 45 minutes mins

Total Time 1 hour hr 5 minutes mins

Servings: 8 servings

Ingredients Method

Ingredients

  

• 1 pound breakfast sausage (pork or turkey), casings removed
• 1 tablespoon olive oil (if needed)
• 1 small onion, diced
• 1 red bell pepper, diced
• 2 cups baby spinach, roughly chopped
• 8 large eggs
• 1 3/4 cups milk (whole or 2%)
• 1/2 cup heavy cream (optional for extra richness; sub more milk)
• 1 teaspoon Dijon mustard
• 1 teaspoon garlic powder
• 1/2 teaspoon smoked paprika
• 1 teaspoon kosher salt, plus more to taste
• 1/2 teaspoon black pepper
• 6 cups day-old bread cubes (sourdough, baguette, or sandwich bread)
• 1 1/2 cups shredded sharp cheddar
• 1/2 cup shredded mozzarella or Monterey Jack
• 2 green onions, thinly sliced (optional garnish)

Method

 

1. Prep the pan: Grease a 9x13-inch baking dish.Heat oven to 350°F (175°C) if baking right away.
2. Cook the sausage: In a large skillet over medium heat, brown the sausage, breaking it up as it cooks. Drain excess fat if needed.
3. Soften the veggies: Add onion and red pepper to the skillet with a touch of olive oil if the pan is dry. Cook 4–5 minutes until tender.Stir in spinach to wilt. Season lightly with salt and pepper. Remove from heat.
4. Make the custard: In a large bowl, whisk eggs, milk, cream, Dijon, garlic powder, smoked paprika, salt, and pepper until smooth.
5. Assemble: Add bread cubes to the baking dish.Scatter sausage and veggies over the bread. Sprinkle cheddar and mozzarella. Pour the egg mixture evenly over everything.Press gently so the bread soaks it up.
6. Rest: Let sit 15 minutes to hydrate, or cover and refrigerate up to 12 hours for a deeper soak.
7. Bake: Cover with foil and bake 30 minutes. Remove foil and bake 15–20 minutes more, until puffed, golden, and a knife in the center comes out clean.
8. Finish and serve: Rest 10 minutes. Top with green onions.Slice and serve warm.

What Makes This Recipe So Good

• Hands-off cooking: Brown the sausage, whisk the eggs, and the oven does the rest.
• Flexible ingredients: Use your favorite cheese, bread, and veggies—no need for a grocery run.
• Make-ahead friendly: Assemble the night before for fuss-free mornings.
• Great for sharing: Serves a crowd and slices cleanly for buffets.
• Balanced and satisfying: Protein, carbs, and veggies in one pan.

Ingredients

• 1 pound breakfast sausage (pork or turkey), casings removed
• 1 tablespoon olive oil (if needed)
• 1 small onion, diced
• 1 red bell pepper, diced
• 2 cups baby spinach, roughly chopped
• 8 large eggs
• 1 3/4 cups milk (whole or 2%)
• 1/2 cup heavy cream (optional for extra richness; sub more milk)
• 1 teaspoon Dijon mustard
• 1 teaspoon garlic powder
• 1/2 teaspoon smoked paprika
• 1 teaspoon kosher salt, plus more to taste
• 1/2 teaspoon black pepper
• 6 cups day-old bread cubes (sourdough, baguette, or sandwich bread)
• 1 1/2 cups shredded sharp cheddar
• 1/2 cup shredded mozzarella or Monterey Jack
• 2 green onions, thinly sliced (optional garnish)

How to Make It

1. Prep the pan: Grease a 9×13-inch baking dish.

   Heat oven to 350°F (175°C) if baking right away.

2. Cook the sausage: In a large skillet over medium heat, brown the sausage, breaking it up as it cooks. Drain excess fat if needed.
3. Soften the veggies: Add onion and red pepper to the skillet with a touch of olive oil if the pan is dry. Cook 4–5 minutes until tender.

   Stir in spinach to wilt. Season lightly with salt and pepper. Remove from heat.

4. Make the custard: In a large bowl, whisk eggs, milk, cream, Dijon, garlic powder, smoked paprika, salt, and pepper until smooth.
5. Assemble: Add bread cubes to the baking dish.

   Scatter sausage and veggies over the bread. Sprinkle cheddar and mozzarella. Pour the egg mixture evenly over everything.

   Press gently so the bread soaks it up.

6. Rest: Let sit 15 minutes to hydrate, or cover and refrigerate up to 12 hours for a deeper soak.
7. Bake: Cover with foil and bake 30 minutes. Remove foil and bake 15–20 minutes more, until puffed, golden, and a knife in the center comes out clean.
8. Finish and serve: Rest 10 minutes. Top with green onions.

   Slice and serve warm.

Storage Instructions

• Refrigerate: Cool completely, then store slices in airtight containers for up to 4 days.
• Reheat: Microwave individual portions 60–90 seconds, or warm in a 325°F oven for 10–15 minutes.
• Freeze: Wrap slices tightly and freeze up to 2 months. Thaw overnight in the fridge before reheating.

Health Benefits

This casserole offers a good amount of protein from eggs and sausage, which helps keep you full and energized through late morning. Vegetables like spinach and peppers add fiber, vitamin C, and iron.

Using day-old whole grain bread boosts complex carbs for steady energy. Want more high-protein breakfast ideas? You might like these easy, make-ahead bars: Blueberry Oat Protein Bars.

Common Mistakes to Avoid

• Skipping the soak: Dry pockets happen if the bread doesn’t absorb the custard.

  Give it at least 15 minutes or rest overnight.

• Overbaking: That leads to rubbery eggs. Pull it when the center is just set.
• Too much moisture: Don’t add watery veggies raw. Sauté them first to cook off moisture.
• Using fresh, soft bread: It can turn mushy.

  Lightly stale bread holds texture better.

Variations You Can Try

• Southwest: Swap cheddar for pepper jack, add a small can of green chiles, and top with salsa and avocado.
• Mushroom and Swiss: Sauté cremini mushrooms and use Swiss or Gruyère.
• Low-carb: Skip the bread and add more veggies (zucchini, broccoli) for a crustless bake.
• Bacon or ham: Replace or mix with sausage for a different flavor profile.
• Herb-forward: Add fresh parsley, chives, or thyme for brightness.

Craving a sweet option to balance the plate? Try this cozy favorite: Overnight Cinnamon Roll French Toast Casserole. For another savory bake that serves a crowd, see this classic: Easter Breakfast Casserole Bake.

FAQ

Can I make this dairy-free?

Yes.

Use an unsweetened dairy-free milk, skip the cream, and swap in a dairy-free cheese. The texture will still be tender and set.

What’s the best bread to use?

Day-old sourdough or a sturdy country loaf works best. French bread or thick sandwich bread also holds up nicely.

Can I assemble and freeze it unbaked?

It’s better to bake first, then freeze.

Unbaked egg mixtures can separate when thawed. Bake, cool, slice, and freeze for the best texture.

How do I know when it’s done?

The center should be set but slightly jiggly, not liquid. A knife inserted in the middle should come out without runny egg, and the top should be golden.

What should I serve with it?

Fresh fruit, a simple green salad, or pastries pair well.

For a crowd-pleasing sweet side, try this Blueberry Brunch Bundt Cake.

In Conclusion

This Sausage and Egg Brunch Casserole is the kind of recipe you’ll keep on repeat: simple steps, flexible ingredients, and reliably delicious results. Prep it ahead for holidays, weekends, or anytime you want a low-stress breakfast that still feels special. If you’re planning a full spread, add a bright side like this Lemon Asparagus Easter Salad to round things out.

Enjoy warm slices now—and the leftovers just might be even better tomorrow.