Simple Breakfast Casserole for a Crowd: 2 Must-Try Dishes

There’s something truly magical about waking up to the aroma of a hearty breakfast baking in the oven, especially when you know it’s going to feed a happy house full of people. I’ve spent countless mornings trying to juggle frying eggs, crisping bacon, and toasting bread for a hungry crowd, only to end up with a messy kitchen and a slightly frazzled host. That’s when I discovered the absolute brilliance of a breakfast casserole. It’s a game-changer for entertaining, allowing you to prep ahead and enjoy your guests, coffee in hand, rather than being chained to the stove. Today, I’m sharing not one, but two fantastic recipes for a Simple Breakfast Casserole for a Crowd, because, let’s be honest, variety is the spice of life, even at breakfast!

Why you’ll love these dishes

If you’ve ever hosted a brunch or a big family breakfast, you know the struggle: you want to serve something delicious and satisfying, but you also want to enjoy the company. These breakfast casserole recipes are the ultimate solution. They’re incredibly forgiving, can often be assembled the night before, and bake into a beautiful, comforting dish that everyone loves. Plus, they’re budget-friendly and super versatile, allowing you to use up whatever you have on hand. It’s perfect for holiday mornings, lazy weekend brunches, or even just feeding a large family on a busy weekday since leftovers reheat beautifully.

> “I used to dread hosting breakfast for more than a few people. This casserole recipe changed everything! It’s so easy to make ahead, and everyone raves about it every time. A total lifesaver!” – A happy brunch host

How these recipes come together

Both of these Simple Breakfast Casserole for a Crowd recipes follow a similar, straightforward process, making them ideal for busy hosts. Generally, you’ll start by preparing your base – whether that’s bread, potatoes, or hash browns. Then, you’ll layer in your chosen proteins and vegetables, creating a flavorful foundation. Finally, a rich egg and dairy mixture is poured over everything, binding it all together and ensuring a moist, delicious bake. Many steps can be completed the night before, meaning all you have to do in the morning is pop it in the oven and brew some coffee.

What you’ll need

Classic Sausage & Cheese Breakfast Casserole

• 1 lb breakfast sausage, cooked and crumbled
• 6-8 slices of bread (day-old works best), crusts removed and cubed
• 2 cups shredded cheddar cheese
• 8 large eggs
• 2 cups milk (whole or 2%)
• 1 teaspoon dry mustard
• 1/2 teaspoon salt
• 1/4 teaspoon black pepper
• Optional: 1/4 cup chopped green onions for garnish

Veggie-Loaded Hash Brown Breakfast Casserole

• 1 (30-oz) bag frozen shredded hash browns, thawed
• 1 tablespoon olive oil
• 1 small onion, chopped
• 1 bell pepper (any color), chopped
• 1 cup chopped mushrooms
• 1.5 cups shredded Monterey Jack cheese (or a blend)
• 8 large eggs
• 1.5 cups milk (whole or 2%)
• 1/2 teaspoon garlic powder
• 1/2 teaspoon salt
• 1/4 teaspoon black pepper

Directions to follow

Classic Sausage & Cheese Breakfast Casserole

1. Prep the oven and dish: Preheat your oven to 350°F (175°C). Grease a 9×13 inch baking dish.
2. Cook the sausage: In a large skillet, cook the breakfast sausage over medium heat, breaking it up as it browns. Drain any excess fat.
3. Assemble the base: Scatter the cubed bread evenly over the bottom of the prepared baking dish.
4. Layer it up: Sprinkle the cooked sausage over the bread, followed by an even layer of shredded cheddar cheese.
5. Whisk the egg mixture: In a large bowl, whisk together the eggs, milk, dry mustard, salt, and pepper until well combined.
6. Pour and chill: Carefully pour the egg mixture evenly over the ingredients in the baking dish. Gently press down on any bread pieces that are floating to ensure they soak up the liquid.
7. Rest (optional but recommended): Cover the dish with plastic wrap and refrigerate for at least 30 minutes, or preferably overnight, to allow the flavors to meld and the bread to soak up the egg mixture.
8. Bake: Remove from the refrigerator 30 minutes before baking (if chilled overnight). Bake for 45-55 minutes, or until the casserole is set in the center and lightly golden brown on top. A knife inserted near the center should come out clean.
9. Serve: Let stand for 5-10 minutes before slicing and serving. Garnish with green onions if desired.

Veggie-Loaded Hash Brown Breakfast Casserole

1. Prep the oven and dish: Preheat your oven to 375°F (190°C). Grease a 9×13 inch baking dish.
2. Sauté veggies: In a large skillet, heat olive oil over medium heat. Add the chopped onion and bell pepper and cook until softened, about 5-7 minutes. Add the mushrooms and cook until their liquid has evaporated.
3. Layer the hash browns: Spread the thawed hash browns evenly over the bottom of the prepared baking dish.
4. Add veggies and cheese: Sprinkle the sautéed vegetables evenly over the hash browns, followed by the shredded Monterey Jack cheese.
5. Whisk the egg mixture: In a large bowl, whisk together the eggs, milk, garlic powder, salt, and pepper until well combined.
6. Pour and bake: Pour the egg mixture evenly over the hash browns, veggies, and cheese.
7. Bake: Bake for 50-60 minutes, or until the casserole is golden brown and set in the center. Similar to the sausage casserole, a knife inserted should come out clean.
8. Serve: Let stand for a few minutes before serving.

How to plate and pair

Both of these breakfast casseroles are incredibly satisfying on their own, but a few simple additions can really elevate your brunch spread. For the Classic Sausage & Cheese Casserole, a side of fresh fruit salad or some steamed asparagus adds a nice touch of freshness to balance the richness. The Veggie-Loaded Hash Brown Casserole pairs wonderfully with a dollop of sour cream or a sprinkle of fresh chopped chives. Don’t forget a good pot of coffee and perhaps some orange juice to complete the meal! A simple green salad with a light vinaigrette can also be a surprisingly good pairing, offering a refreshing counterpoint.

Keeping leftovers fresh

One of the best things about making a large casserole is the potential for delicious leftovers! Once fully cooled, cover the casserole tightly with plastic wrap or transfer individual portions to airtight containers. It will keep well in the refrigerator for up to 3-4 days.

Reheating: To reheat, you can either warm individual slices in the microwave (covering with a damp paper towel helps prevent drying out) or place the entire dish back in a preheated oven at 300°F (150°C) until heated through, about 15-20 minutes for a larger portion.

Freezing: Both casseroles freeze surprisingly well! Once baked and cooled completely, you can cut the casserole into individual portions and wrap each piece tightly in plastic wrap, then aluminum foil. Store in a freezer-safe bag or container for up to 2-3 months. Thaw overnight in the refrigerator before reheating.

Helpful cooking tips

• Don’t skip the rest time: For the Classic Sausage & Cheese Casserole, allowing the casserole to sit, especially overnight, truly helps the bread soak up the egg mixture, resulting in a more cohesive and evenly textured dish.
• Don’t overcook: Keep an eye on your casserole towards the end of the baking time. Overcooking can lead to a dry, rubbery texture. It’s done when the center is set and a knife inserted comes out clean.
• Thaw hash browns completely: For the Veggie-Loaded Hash Brown Casserole, make sure your frozen hash browns are fully thawed and squeeze out any excess moisture. This prevents a watery casserole.
• Consider your dish size: A 9×13 inch baking dish is standard for a crowd, but if you’re feeding an extra-large group, you might consider making two or using a larger catering-style pan and adjusting cooking time.
• Customize your cheese: While cheddar and Monterey Jack are suggested, feel free to experiment with other cheeses like Gruyere, Swiss, or a Colby Jack blend.

Creative twists

These recipes are fantastic starting points, but feel free to let your culinary imagination run wild!

• Spice it up: Add a pinch of red pepper flakes to the egg mixture, or incorporate some diced jalapeños (seeded for less heat) to either casserole for a little kick.
• Add more veggies: For the Classic Sausage & Cheese, consider adding sautéed mushrooms, bell peppers, or spinach along with the sausage. For the hash brown version, broccoli florets or zucchini would be excellent additions.
• Protein swap: Instead of sausage, try cooked and crumbled bacon, diced ham, or even shredded chicken for a different protein profile in the classic recipe. For a vegetarian option, use plant-based sausage or extra veggies.
• Herb power: Fresh herbs like parsley, chives, or thyme can brighten up either casserole nicely. Add them to the egg mixture or sprinkle on top before serving.
• Different bread: In the Classic Casserole, experiment with different types of bread like brioche, sourdough, or even croissants for a richer texture. Just be aware that sweeter breads might change the flavor profile.

Common questions

Can I make these casseroles ahead of time?

Absolutely! Both recipes are ideal for make-ahead. You can assemble them the night before, cover tightly, and refrigerate. In the morning, let them sit at room temperature for 30 minutes while your oven preheats, then bake as directed. This is a huge time-saver for entertaining!

How do I know if my casserole is cooked through?

The best way to check for doneness is to insert a knife into the center of the casserole. If it comes out clean with no raw egg mixture attached, it’s ready. The top should also be golden brown and the edges lightly puffed.

Can I make a smaller portion?

Yes, you can easily halve both recipes to fit an 8×8 inch square baking dish. You may need to slightly reduce the baking time, so keep an eye on it and use the knife test for doneness.

What if I don’t have fresh bread for the classic casserole?

While day-old bread is ideal for soaking up the egg mixture without becoming soggy, fresh bread works too. You can lightly toast fresh bread slices in the oven or a toaster before cubing to give them a similar texture.

Hearty Sausage & Veggie Breakfast Casserole

This hearty breakfast casserole is packed with savory sausage, fresh vegetables, and cheesy goodness, perfect for feeding a crowd or for meal prepping. Enjoy a delicious and easy-to-make breakfast that will keep you full and satisfied.

Print Recipe Pin Recipe

Prep Time 25 minutes mins

Cook Time 1 hour hr

Total Time 1 hour hr 25 minutes mins

Servings 8 people

Calories 450 kcal

Equipment

• 9×13 inch baking dish
• Skillet
• Large bowl
• Whisk
• Aluminum foil

Ingredients

  

Main Ingredients

• 10-12 slices stale bread, cubed (challah or brioche recommended for richness)
• 1 pound breakfast sausage, cooked and crumbled
• 12 large eggs, beaten
• 2 cups whole milk
• 2 cups shredded sharp cheddar cheese, divided
• 1/2 cup finely chopped yellow onion
• 1/2 cup finely chopped red bell pepper
• 1 teaspoon salt
• 1/2 teaspoon black pepper
• garlic powder (optional) Pinch of
• dried mustard (optional) Pinch of

Instructions

 

Preparation

• Lightly grease a 9×13 inch baking dish and spread the cubed stale bread evenly over the bottom.
• In a skillet, cook the breakfast sausage until browned and crumbled; drain any excess grease. Sauté the chopped onion and bell pepper in the same skillet until softened.
• Scatter the cooked sausage, sautéed onion, and bell pepper over the bread cubes in the baking dish.
• In a large bowl, whisk together the eggs, milk, salt, black pepper, and optional seasonings until well combined.
• Pour the egg mixture evenly over the bread and sausage layers, ensuring all the bread is moistened.
• Sprinkle 1 1/2 cups of the shredded cheese over the top.
• Cover the dish and refrigerate for at least 4 hours, or preferably overnight, to allow the bread to soak up the liquid.

Baking

• Preheat your oven to 375°F (190°C) when ready to bake.
• Remove the casserole from the refrigerator, uncover, and let sit at room temperature for 15-20 minutes.
• Sprinkle the remaining 1/2 cup of shredded cheese over the casserole.
• Bake for 50-60 minutes, or until the casserole is set in the center and golden brown on top.
• Let the casserole rest for 5-10 minutes before slicing and serving.

Notes

For best results, prepare the casserole the night before so the bread has ample time to absorb the egg mixture, resulting in a more custardy texture. If the top browns too quickly during baking, loosely tent it with aluminum foil to prevent burning.