Old-Fashioned Breakfast Casserole

🕒 Prep: 15 min
🔥 Cook: 1 hour
🍽 Serves: 8
★★★★★
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This Old-Fashioned Breakfast Casserole is like a warm hug on a chilly morning. It's a hearty, satisfying dish that combines savory sausage, gooey cheese, and fluffy eggs baked into comforting layers. Perfect for family gatherings or a lazy weekend brunch.

Old-Fashioned Breakfast Casserole

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Ingredients for Old-Fashioned Breakfast Casserole

Ingredients for Old-Fashioned Breakfast Casserole

Thick-cut white bread serves as the base, soaking up all the flavors and giving structure to the casserole. Breakfast sausage brings a savory, meaty punch, while shredded sharp cheddar cheese adds a creamy, tangy layer that melts beautifully. The eggs and whole milk form the custard that binds everything together, seasoned with dry mustard, black pepper, and salt for a subtle kick. Finally, fresh green onions and red bell pepper add color and a touch of sweetness.

Why This Old-Fashioned Breakfast Casserole Works

In the oven, the bread cubes soak up the egg and milk like little sponges. At first the dish looks very wet, but as it bakes, the bread swells and holds that liquid in place. By the time it finishes, those cubes have turned into a soft base that stays together instead of falling apart like loose toast pieces.

While everything cooks, the eggs slowly set around the bread, sausage, and cheese. That egg mixture firms up and locks the sausage and cheese in between the bread cubes, so each scoop comes out in one solid piece. The cheese melts into the gaps and then slightly tightens as it cools, which also keeps the casserole from breaking apart.

As the top keeps baking with the foil off, the surface dries a bit and turns golden. Underneath, the soaked bread stays tender and moist. Letting it sit for a few minutes at the end gives the hot egg and cheese time to settle, so the slices cut cleanly and don’t ooze all over the pan.

Old-Fashioned Breakfast Casserole Tips & Tricks

  • Cut the bread into cubes the night before and let them dry out a bit for better texture.
  • If you’re making it ahead, assemble the casserole the night before, cover, and refrigerate. Bake it fresh in the morning.
  • For a spicier kick, add a pinch of cayenne pepper to the egg mixture.

Mistakes To Avoid

Pouring the egg mixture unevenly over the bread and sausage can leave some spots soaked and others dry. The soaked areas turn heavy and soggy, while the dry corners stay hard and crumbly. The casserole ends up with random wet pockets instead of a soft, even middle.

Baking at a higher temperature to “speed it up” often causes the top to brown fast while the center stays loose. The cheese can harden and the bread on top can dry out before the egg mixture in the middle has a chance to set. Slices then come out with a firm crust and a runny, shaky center.

Skipping the step of draining the sausage fat leads to a greasy casserole. Extra fat seeps into the bread cubes as it bakes, so the bottom layer turns oily and heavy instead of soft and custardy. The top may look fine, but the underside can feel slick and unpleasant.

Using very fresh, super soft bread instead of thicker, slightly drier slices makes the base collapse. The bread soaks up too much liquid and breaks down into a mushy layer. Instead of distinct, tender cubes, the casserole turns into a dense, pudding-like slab.

Equipment Used:

9x13-inch baking dish, mixing bowl, skillet

Ingredients

  1. 8 slices of thick-cut white bread
  2. 1 lb of breakfast sausage
  3. 2 cups of shredded sharp cheddar cheese
  4. 6 large eggs
  5. 2 cups of whole milk
  6. 1 tsp of dry mustard
  7. 1/2 tsp of black pepper
  8. 1/4 tsp of salt
  9. 1/4 cup of chopped green onions
  10. 1/4 cup of diced red bell pepper

Step-by-step Instructions

  1. 1. Preheat your oven to 350°F (175°C).
  2. 2. Grease a 9x13-inch baking dish with butter or non-stick spray.
  3. 3. Cut the bread into 1-inch cubes and spread them evenly in the baking dish.
  4. 4. In a skillet, cook the sausage over medium heat until browned and crumbled. Drain excess fat.
  5. 5. Scatter the cooked sausage over the bread cubes.
  6. 6. Sprinkle the shredded cheddar cheese evenly over the sausage and bread.
  7. 7. In a mixing bowl, whisk together the eggs, milk, dry mustard, black pepper, and salt.
  8. 8. Pour the egg mixture evenly over the bread, sausage, and cheese.
  9. 9. Sprinkle the chopped green onions and diced red bell pepper on top.
  10. 10. Cover the dish with aluminum foil and bake for 30 minutes.
  11. 11. Remove the foil and bake for an additional 15 minutes, or until the top is golden brown and the casserole is set.
  12. 12. Let it cool slightly before serving.

Frequently Asked Questions

Can I use a different type of bread?
Yes, any sturdy bread like sourdough or whole wheat would work well.
Is there a vegetarian version of this casserole?
Absolutely! Substitute the sausage with sautéed mushrooms or plant-based sausage.
How do I know when the casserole is done?
The top should be golden brown, and the center should be set (not jiggly).

Serving Ideas for Old-Fashioned Breakfast Casserole

This casserole pairs wonderfully with a fresh fruit salad for a balanced breakfast. For a more indulgent brunch, serve it alongside crispy bacon or a batch of flaky biscuits. A dollop of sour cream or a drizzle of hot sauce on individual servings can add a fun twist, too.

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This recipe is for informational purposes only. Always follow proper food safety practices, cook foods to safe internal temperatures, and store leftovers appropriately. Results may vary.