Overnight Sausage and Egg Breakfast Casserole
This casserole is perfect for lazy mornings or when you have guests. Prep it the night before, let it sit in the fridge, and bake it in the morning. It’s hearty, cheesy, and full of comforting flavors.
If you’re looking for a breakfast dish that’s hearty, flavorful, and practically effortless, an overnight sausage and egg breakfast casserole is the way to go.
This dish is perfect for mornings when you want to serve something homemade without spending hours in the kitchen.
All the prep happens the night before, so all you have to do in the morning is pop it in the oven and let it bake while you relax or finish other tasks.
Layers of savory sausage, fluffy eggs, gooey cheese, and a touch of seasoning make this casserole a breakfast favorite.
It’s endlessly customizable too—add veggies, swap in different cheeses, or even use a meat substitute for a twist.
Whether you’re feeding a crowd or meal-prepping for the week, it’s a satisfying, one-pan solution that hits the spot every time.
Serve it with fresh fruit or a side of toast, and you’ve got a complete breakfast that feels special without the stress.
Perfect for holiday mornings, brunch with friends, or just treating yourself to something delicious.
Ingredients
● 1 lb breakfast sausage (use your favorite—spicy, mild, or maple)
● 8 slices of bread, cubed (day-old bread works best)
● 2 cups shredded cheese (cheddar, mozzarella, or a mix)
● 8 large eggs
● 2 1/2 cups milk
● 1/2 cup heavy cream (makes it extra rich, but you can use more milk if you want)
● 1 tsp mustard powder (optional, adds a nice tang)
● 1 tsp garlic powder
● 1/2 tsp salt
● 1/4 tsp black pepper
● 1/4 cup chopped green onions or parsley for garnish
Instructions
1. Cook the Sausage:
● Brown the sausage in a skillet over medium heat. Break it into crumbles as it cooks. Drain any grease and let it cool slightly.
2. Assemble the Casserole:
● Grease a 9×13-inch baking dish.
● Spread the bread cubes evenly in the dish. ( If your bread is too fresh, toast it lightly to avoid a soggy casserole.)
● Sprinkle the cooked sausage over the bread, followed by the shredded cheese.
3. Prepare the Egg Mixture:
● In a large bowl, whisk together eggs, milk, cream, mustard powder, garlic powder, salt, and pepper until smooth. (Make sure everything is well-combined, so the casserole bakes evenly.)
4. Combine and Chill:
● Pour the egg mixture evenly over the bread, sausage, and cheese. Use a spoon to gently press the bread down so it soaks up the liquid.
● Cover with foil or plastic wrap and refrigerate overnight.
5. Bake:
● Preheat your oven to 350°F (175°C) in the morning.
● Remove the casserole from the fridge and let it sit at room temperature while the oven preheats. (This helps it bake evenly.)
● Bake uncovered for 45-50 minutes or until the center is set and the top is golden.
● A knife inserted into the middle should come out clean.
6. Serve:
● Let it rest for about 5-10 minutes after baking. Garnish with green onions or parsley for a pop of color.
Tips for Success
● Bread Choice: Use hearty bread like French, sourdough, or even brioche for the best texture.
● Customizing: Add veggies like diced bell peppers, mushrooms, or spinach if you want to sneak in some greens. Just sauté them before adding to the casserole.
● Cheese Variety: Swap out the cheddar for pepper jack if you want a little kick.
● Make-Ahead Magic: If you’re in a hurry, you can prep it in the morning and let it sit for just an hour before baking, but overnight soaking gives the best results.
This casserole is a crowd-pleaser every time. Pair it with fresh fruit or coffee, and you’ve got a breakfast everyone will love!
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