Sausage Egg & Cheese Breakfast Casserole: The Perfect Make-Ahead Breakfast

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Few things are better than waking up to a warm, cheesy, protein-packed breakfast that requires zero effort in the morning.

This Sausage Egg & Cheese Breakfast Casserole is as classic as it gets, with savory sausage, fluffy eggs, and melty cheddar all baked together in one easy dish. Whether you’re feeding a crowd for brunch, meal prepping for the week, or just craving a no-fuss, hearty breakfast, this recipe delivers big flavor with minimal effort.

Assemble it the night before and let the custard soak into the bread for a richer, more indulgent texture, or bake it fresh in the morning—it’s a win either way.

Why You’ll Love This Breakfast Casserole

• It’s an easy one-pan breakfast that serves a crowd
• Packed with protein to keep you full and satisfied
• Perfect for making ahead and reheating all week – or if you have a big crowd coming to brunch and need to make up a few the day before, this is the perfect crowd-pleasing recipe
• Customizable—swap in bacon, ham, or different cheeses for variety (get wild!)

How to Make Sausage Egg & Cheese Breakfast Casserole Recipe

Ingredients

• 1 pound breakfast sausage (pork or turkey)
• 6 large eggs
• 1 ½ cups whole milk
• 1 cup shredded cheddar cheese
• ½ cup shredded mozzarella cheese
• 4 cups cubed bread (French bread or sourdough)
• ½ teaspoon garlic powder
• ½ teaspoon onion powder
• ½ teaspoon salt
• ¼ teaspoon black pepper
• 1 tablespoon butter (for greasing the baking dish)
• 2 green onions, sliced (optional, for garnish)

Instructions

Preheat the oven to 375°F and grease a 9×13-inch baking dish with butter.

In a large skillet over medium heat, cook the sausage until browned and fully cooked, breaking it up into crumbles as it cooks. Drain any excess grease.

Spread the cubed bread evenly in the greased baking dish. Top with the cooked sausage and shredded cheeses.

In a large mixing bowl, whisk together the eggs, milk, garlic powder, onion powder, salt, and pepper.

Pour the egg mixture evenly over the casserole, pressing the bread down gently to absorb the custard.

Let it sit for at least 20 minutes or cover and refrigerate overnight for a deeper flavor.

Bake uncovered for 35-40 minutes, or until the center is set and the top is golden brown.

Let the casserole cool for a few minutes before slicing. Garnish with sliced green onions if desired, then serve warm.

Nutrition Information

(Per Serving, based on 8 servings)

Calories: 380
Protein: 21g
Carbs: 22g
Fat: 24g

** Please note that the nutritional values are just estimates and may vary based on the ingredients you use. If you are counting your macros, please check all the labels to make sure you stay in this range!

Tips for the Best Breakfast Casserole

• For extra texture, toast the bread cubes for a few minutes before assembling the casserole
• Use spicy sausage if you like a little heat, or try ham or bacon for a different flavor profile
• Want a low-carb version? Swap the bread for sautéed bell peppers and mushrooms
• Top with an extra sprinkle of cheddar and mozzarella for a gooey, cheesy top layer

Final Thoughts

This Sausage, Egg & Cheese Breakfast Casserole is a true brunch staple—a savory, make-ahead breakfast that’s both comforting and effortless. Whether you’re hosting a holiday brunch, meal prepping for the week, or just looking for an easy way to feed your family in the morning, this protein-packed casserole will have everyone coming back for seconds.

Make it once, and you’ll wonder how you ever survived without it.

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