Overnight Sausage and Egg Breakfast Casserole

Savory Breakfast or Brunch Casserole
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  • 60 mins
  • Prep: 15 mins,
  • Cook: 45 mins
  • Yield: 8 servings
Ratings (12)

This overnight breakfast (or brunch) casserole is full of flavor, with eggs, bread, sausage, cheese, and seasonings. It's the perfect egg casserole recipe for a holiday or weekend morning meal.

One thing that makes this casserole and other similar casseroles so perfect for a busy weekend or holiday morning is that it is prepared the night before. All you have to do in the morning is remove it from the refrigerator, let it stand to warm up a bit, and then pop it into a preheated oven. Serve it along with fresh diced or sliced melon or grapes, or a warmed fruit compote mixture. Sliced tomatoes go nicely with egg dishes as well.

The dish is also quite versatile. Feel free to replace the ground bulk sausage with turkey sausage or sliced sausage links, or replace the sausage with cooked and crumbled bacon or diced ham. Or replace the sliced bread with quartered or coarsely crumbled buttered biscuits.

Chopped steamed asparagus or broccoli florets would be a nice addition to the casserole, too, especially if you're making it for a brunch or lunch. Chopped onions or scallions may be added as well. Or saute 4 to 6 ounces of sliced mushrooms in a small amount of butter and add them to the egg mixture.

If you enjoy Tex-Mex flavors, add a 4-ounce can of mild chopped green chile peppers or 1/2 cup of finely chopped bell pepper along with 1/2 cup of finely chopped onion. Use a Mexican blend of cheeses or part pepper jack cheese instead of cheddar, and add a few teaspoons of chili powder or taco seasoning. This combination is excellent served with fresh or purchased tomato salsa.

The casserole makes enough for eight people, and it's easily scaled up or down.

What You'll Need

How to Make It


  1. Lightly butter each slice of bread and then cut the slices in half. Arrange the bread slices in a 9-by-13-by-2-inch baking pan.
  2. In a large skillet or saute pan, brown the sausage. Use a spatula or spoon to break up. Drain and pat with paper towels. Sprinkle sausage over bread slices. Sprinkle cheese over sausage.
  3. In a mixing bowl, whisk together eggs, salt, dry mustard, and the milk until well blended. Pour egg mixture over bread, sausage, and cheese. Cover pan with foil and refrigerate overnight.
  1. Remove from refrigerator and let stand for 15 to 20 minutes.
  2. Preheat oven to 350 F.
  3. Remove the foil from pan and bake the casserole for 45 minutes or until casserole is bubbly and lightly browned on top. It might take a bit longer if it's still quite cold. A knife inserted into the center should come out clean.
  4. Let the breakfast casserole stand for 15 to 20 minutes after baking.