Easy Overnight Breakfast Casserole

Start your day effortlessly with this overnight breakfast casserole. Combining savory sausage, fluffy eggs, and melted cheese over hearty bread, it’s perfect for feeding a crowd. For more breakfast inspirations, explore our Sausage Gravy Recipe and Homemade Waffle Recipe. Discover tips for make-ahead breakfasts in this EatingWell article.

For busy mornings, our Copycat Starbucks Egg Bites are another great meal-prep option.

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Overnight Breakfast Casserole Recipe

Ingredients:

• 6 slices bread, cubed (French, sourdough, or whole wheat)
• 1 lb breakfast sausage (or bacon/ham), cooked & crumbled
• 1 ½ cups shredded cheese (cheddar, mozzarella, or Swiss)
• 6 large eggs
• 2 cups milk
• ½ tsp salt
• ½ tsp black pepper
• ½ tsp garlic powder (optional)
• ½ tsp onion powder (optional)
• 1 tsp Dijon mustard (adds depth of flavor)
• Chopped green onions or parsley (for garnish)

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Instructions:

1. Grease a 9×13-inch baking dish.
2. Layer the bread cubes evenly in the dish.
3. Sprinkle cooked sausage (or bacon/ham) over the bread.
4. Add shredded cheese on top.
5. Whisk eggs, milk, salt, pepper, garlic powder, onion powder, and mustard in a large bowl.
6. Pour the egg mixture evenly over the casserole.
7. Cover and refrigerate overnight (or at least 4 hours) to soak up flavors.

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Baking Instructions:

1. Preheat oven to 350°F (175°C).
2. Remove casserole from fridge and let it sit at room temp for 15 minutes.
3. Bake uncovered for 40-45 minutes, until golden brown and set in the center.
4. Let it rest for 5 minutes, then garnish with green onions or parsley.

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Serving Ideas & Variations:

🫑 Veggie Version – Add bell peppers, mushrooms, or spinach.
🌶 Spicy Kick – Add jalapeños or red pepper flakes.
🥑 Low-Carb Option – Swap bread for cauliflower or keto bread.

Would you like a gluten-free or dairy-free version too? 😊