The Best Sausage and Cheddar Breakfast Casserole

If you’re searching for an easy breakfast casserole recipe that’s both comforting and customizable, this Sausage & Cheddar Breakfast Casserole is your answer. Perfect for holiday mornings, weekend brunches, or make-ahead meal prep, this dish checks every box: it’s hearty, cheesy, satisfying, and requires just a handful of simple ingredients.

Whether you’re feeding a crowd or prepping for a relaxing Sunday morning, this casserole delivers flavor and convenience in every bite. Let’s walk through how to make it, plus a few creative twists and helpful tips to make it your own!

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Ingredients You’ll Need

• 6 cups cubed day-old bread (French, sourdough, or sandwich bread work great)
  
• 1 lb pork breakfast sausage, cooked and crumbled
  
• 1 ½ cups shredded cheddar cheese
  
• 6 large eggs
  
• 2 cups milk (whole or 2% preferred for creaminess)
  
• 1 tbsp Dijon mustard
  
• ½ tsp salt
  
• ¼ tsp black pepper
  
• Optional: chopped green onions or a dash of paprika for garnish
  

Instructions

1. Prepare the Baking Dish

Lightly grease a 9×13-inch baking dish. Spread your cubed bread evenly across the bottom.

2. Add the Layers

Sprinkle the cooked and crumbled sausage over the bread. Then, scatter the shredded cheddar cheese on top.

3. Whisk the Egg Mixture

In a large mixing bowl, whisk together the eggs, milk, Dijon mustard, salt, and black pepper until smooth.

4. Pour and Soak

Carefully pour the egg mixture over the sausage, cheese, and bread. Press down gently with a spatula so the bread absorbs the liquid.

5. Chill (Optional, but Recommended)

Cover and refrigerate for at least 30 minutes or overnight. This allows the flavors to blend and the bread to soak up the mixture for a creamier texture.

6. Bake

Preheat your oven to 350°F (175°C). Bake uncovered for 45–50 minutes, or until the top is golden and the center is set.

7. Cool and Serve

Let the casserole cool for 5–10 minutes before slicing. Garnish with green onions or paprika if desired.

Easy Breakfast Casserole Variations

One of the best parts about this easy breakfast casserole recipe is how adaptable it is. Here are some ways you can switch it up:

• Turkey Sausage: Want a leaner option? Substitute pork sausage with cooked turkey sausage crumbles for a lighter version.
  
• Vegetarian: Skip the meat and add sautéed mushrooms, spinach, and bell peppers.
  
• Cheese Swap: Try pepper jack, Swiss, or a cheddar-Monterey Jack blend for a flavor boost.
  
• Bread Base: Use croissants or bagels for a buttery, rich twist. Even gluten-free bread works if needed.
  
• Add Heat: Add a few dashes of hot sauce to the egg mixture or stir in diced jalapeños.
  

Serving Tips

This casserole is super flexible when it comes to serving:

• For Brunch: Pair it with fresh fruit, muffins, or a simple green salad.
  
• For a Crowd: Double the recipe and bake it in two pans. Serve buffet-style with toppings like salsa, sour cream, or avocado.
  
• Make-Ahead Friendly: Prepare it the night before and pop it in the oven the next morning. It makes early mornings a breeze!
  

Storage & Reheating

• Refrigerate: Store leftovers in an airtight container for up to 4 days.
  
• Freeze: Wrap individual slices tightly and freeze for up to 2 months. Reheat in the microwave or oven until warmed through.
  
• Reheat: Microwave a slice for 45–60 seconds or reheat in a 300°F oven for 10–15 minutes.
  

Frequently Asked Questions

Can I make this breakfast casserole ahead of time?
Yes! In fact, it’s even better if you prep it the night before. Just cover and refrigerate, then bake in the morning.

Do I have to use day-old bread?
Day-old bread is ideal because it holds its shape better and soaks up the egg mixture without becoming soggy. If your bread is fresh, you can toast it in the oven at 300°F for 10 minutes to dry it out a bit.

Can I make this dairy-free?
Yes. Use a dairy-free milk alternative (like almond or oat milk) and swap the cheese for a plant-based version.

Can I use egg whites or an egg substitute?
You can replace some or all of the eggs with egg whites or a liquid egg substitute. Just keep in mind that the texture may be slightly less rich.

How do I know when the casserole is done baking?
The casserole is done when the top is golden, and a knife inserted in the center comes out clean. If needed, cover it loosely with foil to prevent over-browning during the last 10 minutes.

Final Thoughts

This easy breakfast casserole recipe is a tried-and-true favorite that brings people together around the table. With just a few ingredients and simple prep, it delivers major comfort and satisfaction. Whether you’re feeding family on a busy weekday or hosting a special brunch, this dish is bound to become a go-to in your kitchen.

Plus, with so many variations to suit dietary needs or personal preferences, you can truly make it your own. Try it with turkey sausage, veggie add-ins, or your favorite cheese—the possibilities are endless.

Ready to make mornings easier and tastier? Whip up this Sausage & Cheddar Breakfast Casserole and watch it disappear from the table!