Easy Overnight Sausage Breakfast Casserole Recipe

Make mornings simple with this easy Overnight Sausage Breakfast Casserole recipe—delicious, hearty, and ready when you wake up! This savory casserole combines crumbled sausage, eggs, cheese, and bread, baked to golden perfection. It’s the perfect breakfast solution for busy weekdays or relaxed weekend brunches and brings warm comfort with every bite.

Why You’ll Love This Recipe

• Ultimate Convenience: Prepare it the night before, so breakfast is ready to enjoy without any morning hassle.
• Hearty and Filling: Packed with sausage and cheese, it keeps you energized well into the day.
• Family-Friendly: A crowd-pleaser that satisfies kids and adults alike with its rich, comforting flavors.
• Customizable: Adaptable to any taste or dietary preference, from low-carb to vegetarian versions.
• Budget-Friendly: Uses simple pantry staples, making it an affordable way to start your day.

Ingredients You’ll Need

This Overnight Sausage Breakfast Casserole requires simple, everyday ingredients that create layers of flavor and satisfying texture. Each item plays a crucial role in building this delightful breakfast dish.

• Italian Sausage: Provides a savory spice and meaty richness that anchors the casserole’s flavor.
• Eggs: The binding agent that holds everything together while making it fluffy and creamy.
• Milk: Adds moisture and richness for a tender, custard-like texture.
• Bread Cubes: Absorb the egg mixture perfectly, adding body and softness to the casserole.
• Shredded Cheese: Melts throughout, giving every bite a gooey, cheesy delight.
• Onions and Bell Peppers: Bring sweetness and a little crunch, balancing the richness of sausage and eggs.
• Salt and Pepper: Essential seasonings that enhance every ingredient’s natural flavor.

Variations for Overnight Sausage Breakfast Casserole

This recipe is wonderfully flexible, so feel free to get creative and tailor the casserole to fit your taste, health goals, or ingredient availability without losing any of its charm.

• Vegetarian Swap: Replace sausage with mushrooms or plant-based sausage for a meat-free version.
• Low-Carb Option: Use cauliflower rice or omit the bread cubes for a keto-friendly breakfast.
• Spicy Kick: Add jalapeños or hot sauce to spice up the casserole to your liking.
• Different Cheeses: Try cheddar, mozzarella, or pepper jack to vary the flavor profile.
• Additional Veggies: Spinach, tomatoes, or zucchini can be mixed in for extra color and nutrition.

How to Make Overnight Sausage Breakfast Casserole

Step 1: Cook the Sausage

Start by browning the crumbled sausage in a skillet over medium heat until it’s fully cooked and nicely browned. Drain any excess grease and set the sausage aside to cool slightly.

Step 2: Prepare the Vegetable Mix

In the same pan, sauté chopped onions and bell peppers until soft and fragrant. This step unlocks their natural sweetness, adding depth to the casserole.

Step 3: Mix the Custard

In a large bowl, whisk together eggs, milk, salt, and pepper until smooth and well combined. This custard base is key for the casserole’s creamy texture.

Step 4: Assemble the Casserole

Grease your baking dish, then layer the bread cubes evenly on the bottom. Sprinkle the cooked sausage and sautéed veggies on top before pouring the egg mixture over everything. Finally, top with shredded cheese.

Step 5: Refrigerate Overnight

Cover the assembled casserole with plastic wrap and refrigerate overnight. This allows the bread to soak up the custard, making for a tender, flavorful breakfast.

Step 6: Bake the Casserole

In the morning, bake the casserole at 350°F (175°C) for about 45 minutes until the eggs are set and the top is golden and bubbly. Let it cool for a few minutes before serving.

Pro Tips for Making Overnight Sausage Breakfast Casserole

• Use Stale Bread: Slightly stale bread absorbs the custard better without becoming mushy.
• Don’t Overmix: Gently fold ingredients to keep a light texture instead of a dense bake.
• Let It Rest Before Serving: Allow the casserole to cool briefly for easier slicing and better flavor.
• Prepare Ahead: Fully assembled casserole can be made 24 hours in advance, perfect for busy mornings.
• Adjust Spices: Feel free to add herbs like thyme or paprika for extra aroma and taste.

How to Serve Overnight Sausage Breakfast Casserole

Garnishes

Fresh herbs like parsley or chives add a bright, fresh contrast to the richness of the casserole, while a dollop of sour cream or hot sauce can elevate the flavors wonderfully.

Side Dishes

Pair it with fresh fruit salad, crispy bacon, or roasted potatoes for a complete and satisfying breakfast or brunch spread.

Creative Ways to Present

Serve in individual ramekins for a charming personal touch, or load it onto a breakfast buffet table where guests can serve themselves easily.

Make Ahead and Storage

Storing Leftovers

Place any leftover casserole in an airtight container and refrigerate for up to 3 days; it reheats beautifully for a quick breakfast later in the week.

Freezing

You can freeze baked casserole in portions by wrapping them tightly or using freezer-safe containers, keeping them fresh for up to 2 months.

Reheating

Warm leftovers in the microwave or oven until heated through, adding a minute or two if frozen, to enjoy the same comforting flavor without fuss.

FAQs

Can I use ground beef instead of sausage?

Absolutely! Ground beef will work, but the casserole might be less spicy and rich, so consider adding your favorite spices for extra flavor.

Is it necessary to soak the casserole overnight?

Soaking overnight helps the bread absorb the egg mixture fully, giving a better texture, but a few hours can work in a pinch.

Can I make this gluten-free?

Yes, swap regular bread for gluten-free bread or use alternatives like hash browns or cauliflower rice to keep it gluten-free.

How many does this recipe serve?

This casserole comfortably serves 6 to 8 people, making it perfect for families or small gatherings.

Can I add more vegetables?

Definitely! Adding spinach, mushrooms, or zucchini not only boosts nutrition but also enhances flavor and texture.

Final Thoughts

This Overnight Sausage Breakfast Casserole is a true morning lifesaver—a warm, comforting, and customizable dish that makes breakfast effortless yet special. Give it a try, and you might just make it your go-to recipe for busy mornings or weekend brunches with loved ones.

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