Cheesy Sausage Breakfast Casserole: My Go-To Comfort Recipe

Let Me Tell You About This Casserole (And Why I’m Still Dreaming About It)

Alright, so you know how some Saturday mornings just seem to demand something extra? Like – toast and eggs just won’t cut it, you need something that feels like a hug in casserole form. Enter: Cheesy Sausage Breakfast Casserole. The first time I made this was actually after I woke up panicked, realizing I’d promised “a real breakfast” for my folks after New Year’s… and totally forgot until I was brushing my teeth. This recipe? Saved my bacon (well, actually my sausage, but let’s not split hairs). Oddly enough, now it’s my comfort-food fallback. I whip it up when I want to be the hero of breakfast, or when I’ve got company—especially the hungry teenager kind.

Cheesy Sausage Breakfast Casserole

Why I Keep Making This (Spoiler: Cheese & No Morning Chaos)

I make this when I want minimal fuss but max flavor. My family goes a bit feral for the cheesy-gooey edges. Also, sometimes I’m simply too tired to scramble eggs for six people, but still want to look like I tried, you know? It’s forgiving; if you forget the green onions, or add an extra sprinkle of cheese (or three), nobody complains. Plus, cleaning one casserole dish beats cleaning 4 pans and a skillet any day. (Though sometimes the bottom gets a bit crispy—learned to love that too.)

What You’ll Need (Plus a Few Cheeky Substitutions)

  • 1 pound sausage (breakfast sausage is classic, but chorizo? Lovely chaos, try it if you dare. There was that one time I only had spicy Italian and… wow okay, strong.)
  • 1/2 onion, chopped (sometimes I leave it out entirely—my kids pretend onions are poison, apparently)
  • 8 large eggs (I’ve snuck in duck eggs once, no complaints)
  • 2 cups shredded cheese (cheddar, or mozzarella, or whatever’s in the fridge—I’ve even mixed scraps, cheese is cheese)
  • 2 cups milk (honestly, any percent. I’ve even used half-and-half on accident and actually, it was creamier)
  • 6-8 slices day-old bread (Grandma insisted on Texas Toast, but I’ve ripped up leftover buns and baguette ends, works fine!)
  • 1/2 teaspoon black pepper
  • 1/2 teaspoon salt (I go easy on this if the sausage is salty already)
  • 1/4 teaspoon garlic powder (optional, but do it if you love garlic—I’m not your boss)
  • 1/4 cup chopped green onions (or parsley, or skip if you forget—honestly, the casserole doesn’t mind)
  • Cooking spray or a dab of butter for greasing

Here’s How to Throw It Together (With Occasional Chaos)

  1. Preheat your oven to 350°F (180°C, give or take) and grease your casserole dish. I’m partial to a 9×13 inch, but have totally used two smaller dishes when I couldn’t find mine.
  2. Brown the sausage in a skillet, breaking it up with your spatula. Toss in the onions when it’s halfway done. (This is usually where I sneak a little taste, just to be sure it’s as good as it smells.) Drain off the grease unless you love things a bit on the indulgent side.
  3. Scatter the bread cubes in the dish. You want a decent layer—if it looks too sparse, tear up another slice. Sprinkle the sausage and onion mix over the top, then rain down (liberally!) your shredded cheese.
  4. In a big bowl (or a pitcher if you’ve misplaced all your mixing bowls, which—guilty), whisk together the eggs, milk, pepper, salt, and garlic powder. Pour it all evenly over the bread and sausage layers. If some bits stick out, press them down gently—everything needs a good soak.
  5. This is optional, but I like to scatter green onions or extra cheese on top, like confetti. Festive casserole is the best kind.
  6. You can bake it right away for about 45-55 minutes, or, the lazy genius move: cover and chill overnight, then bake first thing. (I’ve done both—overnight is a tad fluffier and more magical, but whatever works). Bake until it’s puffy, golden, and doesn’t jiggle much in the middle. If it looks a little weird at first when puffing up, don’t stress. It settles.

Little Nuggets of Wisdom (aka Lessons from Experience)

  • Letting it cool for 10 minutes makes slicing cleaner. But I also sometimes just dig in with a spoon—no judgment here.
  • If you’re low on bread, throw in a handful of frozen hash browns. One time my bread turned out to be a bit moldy (oops), and hash browns totally saved breakfast.
  • Cheese melts faster than you think. I once burned the cheesy top because I got lost scrolling on my phone. Watch it in the last 10 minutes.

How I’ve Tweaked It (& When It Went Slightly Sideways)

  • Used brioche rolls in place of regular bread — super rich
  • Added roasted red peppers for a smoky vibe. My mum swears mushrooms are good in it, but honestly? The one time I tried, it got a bit watery. Wouldn’t do again. (Maybe if you cook the mushrooms first?)
  • Mixed in a bit of spinach straight from the freezer, just crumbled it in. Sneaky greens!
  • Subbed turkey sausage when I was feeling “healthy.” Not bad, but I missed the old school flavor.
Cheesy Sausage Breakfast Casserole

Do You Need Fancy Gear? Nah

Look, I use my old 9×13 casserole dish. I did try an 8×8 once, then it overflowed—lesson learned, ha. If you don’t have a casserole dish, I’ve done this in a deep oven-safe sauté pan lined with foil. Even borrowed a neighbor’s Pyrex once because mine was lost in cupboard Narnia.

Keeping Leftovers (But Who Are We Kidding?)

You can stash leftovers in the fridge, covered—or even wrap slices in foil. They’ll last 2-3 days, technically. But honestly, in my house, it never lasts more than a day. The casserole tends to disappear like socks in the dryer.

How I Like to Serve It (And Family Traditions)

I personally love topping my piece with a splash of hot sauce. My uncle swears by ketchup, but I try not to judge. Also, if it’s a holiday, we’ll usually have a little fruit salad and bottomless mugs of coffee on the side, just feels right.

If I Could Go Back in Time—Pro Tips

  • Bake the night before if you can. Recipe magic happens overnight, trust me. I once tried rushing the bake right after assembly—ended up with soggy spots.
  • Letting it rest before serving is not a myth! The one time I cut in too fast, cheese lava everywhere. Delicious, just… messy.
  • Use parchment under the dish if you think it might bubble over. I had to chisel burnt egg off the bottom of my oven once—never again.

Friends & Family Questions I Get All the Time

Can I prep this ahead?
Absolutely, you can prep it the night before. Makes mornings feel almost civilized.
Will it freeze?
Yes—sort of. It freezes okay but sometimes the texture gets a wee bit grainy. I’d do it in a pinch though. Thaw in the fridge if you remember; microwave in emergencies.
Does it work without bread?
I mean, it turns out more like an egg bake or crustless quiche, but yes! Not quite the same as the hearty casserole, but it works.
Can I swap the sausage?
Totally, I use whatever’s hanging around. Vegetarian sausage is fine too (though I prefer the real deal—sorry not sorry).
Help, all I have is shredded cheese slices!
Been there! Tear ’em up, throw ’em in, it’ll melt just fine.
Why is my casserole a bit bland?
Did you salt the eggs enough, or maybe the sausage’s on the bland side? A pinch more salt and extra cheese usually sorts it.

Oh, and if you somehow have leftovers—try frying up a slice in a little butter for breakfast the next day. It’s ridiculously good (maybe even better than fresh!). But that’s just me.

Now, go forth and bake! (And warn your family that breakfast casserole does, in fact, count as dinner sometimes. I stand by that.)

★★★★★ 4.10 from 35 ratings

Cheesy Sausage Breakfast Casserole

yield: 8 servings
prep: 20 mins
cook: 40 mins
total: 50 mins
A hearty and comforting breakfast casserole loaded with savory sausage, melted cheese, eggs, and bread. Perfect for feeding a crowd or prepping ahead for busy mornings.
Cheesy Sausage Breakfast Casserole

Ingredients

  • 1 pound breakfast sausage
  • 8 large eggs
  • 2 cups milk
  • 2 cups shredded cheddar cheese
  • 6 cups cubed French bread (about 1 loaf)
  • 1/2 teaspoon salt
  • 1/4 teaspoon black pepper
  • 1/2 teaspoon dried parsley
  • 1/2 cup chopped green onions (optional)

Instructions

  1. 1
    Preheat the oven to 350°F (175°C). Grease a 9×13-inch baking dish.
  2. 2
    In a large skillet over medium heat, cook the sausage until browned and cooked through, breaking it up into crumbles as it cooks. Drain any excess fat.
  3. 3
    Layer the cubed bread evenly in the prepared baking dish. Sprinkle the cooked sausage over the bread, followed by the shredded cheddar cheese and green onions, if using.
  4. 4
    In a large bowl, whisk together the eggs, milk, salt, pepper, and dried parsley. Pour the mixture evenly over the casserole ingredients in the baking dish.
  5. 5
    Bake for 40 minutes, or until the casserole is set and the top is golden brown. Remove from the oven and let stand for 5 minutes before serving.
CLICK FOR NUTRITION INFO

Approximate Information for One Serving

Serving Size: 1 serving
Calories: 360 caloriescal
Protein: 19gg
Fat: 23gg
Saturated Fat: 0g
Trans Fat: 0g
Cholesterol: 0mg
Sodium: 0mg
Potassium: 0mg
Total Carbs: 19gg
Fiber: 0g
Sugar: 0g
Net Carbs: 0g
Vitamin A: 0
Vitamin C: 0mg
Calcium: 0mg
Iron: 0mg

Nutrition Disclaimers

Number of total servings shown is approximate. Actual number of servings will depend on your preferred portion sizes.

Nutritional values shown are general guidelines and reflect information for 1 serving using the ingredients listed, not including any optional ingredients. Actual macros may vary slightly depending on specific brands and types of ingredients used.

To determine the weight of one serving, prepare the recipe as instructed. Weigh the finished recipe, then divide the weight of the finished recipe (not including the weight of the container the food is in) by the desired number of servings. Result will be the weight of one serving.

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