Effortless Breakfast Casserole

Featured in: Delicious Brunch Recipes to Share

Eggs, cheese, and bread come together for a hearty breakfast you can tweak with any fillings. Whip it up ahead and just toss it in the oven next morning to feed everyone.

A woman in a kitchen with a stove and oven.
Updated on Thu, 12 Jun 2025 17:27:33 GMT
A piece of savory egg bake with green onions, mushrooms, and broccoli on a plate. Pin it
A piece of savory egg bake with green onions, mushrooms, and broccoli on a plate. | cookingkitchn.com

Last weekend was wild. You ever get so caught up having a blast out of town that you blank out on chores? That was me, staring at a sad fridge, only then remembering I’d promised to fill my friend’s kids’ bellies. Cue the panic! But then, jackpot—eggs, some milk, cheese, leftover breakfast sausage, a bit of broccoli, and a lone corn cob waiting for a purpose. Dug around in the freezer and found bread. Suddenly I was pumped—no instant mac needed after all!

Easy-Breezy Morning Casserole

These breakfast bakes have saved my butt in the kitchen more times than I can count. You just need bread, eggs, cheese, and milk—it’s almost too easy. If you’ve got some kind of meat, toss it in. I grab sausage when I have it but bacon is delicious too. Or skip meat and just pile on veggies—broccoli, fresh basil, zucchini, whatever you find. It’s super chill; you can’t really mess it up.

What to Grab

  • Sausage: Got a cup of cooked sausage crumbles? Perfect—just toss ‘em in.
  • Bread: Six slices, best if they’re a bit dry. Tear or chop into chunky bits so they soak everything up but stay sturdy.
  • Eggs: Six big ones do the trick—they’ll hold the whole thing together.
  • Milk: Pour in 1 ½ cups. Full-fat milk makes it extra creamy, but 2% is totally cool if that’s all you have.
  • Cheddar cheese: A cup, shredded. I say go sharp—big flavor is where it’s at.
  • Vegetables: Use whatever’s around—broccoli and corn make a great team when you’ve got leftovers.

Get Cookin'

Ready, Set, Prep
Dice up your bread into nice chonky pieces. Hit a casserole dish with cooking spray if you want easy cleanup. Fire up the oven to 350°F.
Build the Layers
Line the dish with bread pieces. In a big bowl, crack the eggs, pour in milk, and mix in cheese—whisk until smooth. Drop your sausage and any veggies evenly across the bread, then pour the egg mixture so it covers everything real well.
Bake Away
Slide your dish into the hot oven and let it go for 35–40 minutes. Check it by poking the middle with a knife—if it comes out clean and the top’s looking tasty brown, you’re set.
Serve It Up
Let it chill for five minutes, then slice into big squares. Dish out while it’s fresh and melty.
Eggs, cheese, ham, broccoli, and mushrooms baked all together in a white casserole dish. Pin it
Eggs, cheese, ham, broccoli, and mushrooms baked all together in a white casserole dish. | cookingkitchn.com

Little Chef Tricks

I’ve learned a thing or two after making a million of these. Sauté mushrooms fast before adding or you’ll end up with wet bits everywhere. Raw veggies are cool, just cut them on the small side unless you’re into extra crunch. Always brown your meat first—trust me. Want it firmer? Crack in another egg or two. Don’t overthink it.

Perfect Sides

This yummy bake covers all the bases—veggies, bread, protein, and tons of cheese. For mornings, I love it next to a pile of fresh fruit. Serving at night? Whip up a simple salad. Forgot veggies in the bake? Sauté some for a side. And if you skipped meat, just fry up bacon on the side instead. Everyone wins here.

Make-Ahead Magic

Wanna know a game-changer for busy mornings? Put the whole thing together the night before, wrap it up, then stash in the fridge. Next day, toss it straight into the oven. When the house is packed and you can’t deal, it’s a lifesaver.

Leftover Love

Ended up with extras? Nice. Just cover it well and it’ll chill in the fridge for a few days, no problem. When it’s time for round two, nuke slices in the microwave or reheat the whole pan at 350°F for about 15 minutes till it’s piping hot.

A casserole full of eggs, ham, mushrooms, and broccoli, topped with green onions and looking super colorful. Pin it
A casserole full of eggs, ham, mushrooms, and broccoli, topped with green onions and looking super colorful. | cookingkitchn.com

Do It Your Way

This is just a jumping-off point. Switch meats—try leftover ham or crispy bacon. Go wild with veggies or throw on some garden herbs. Use any cheese you’re craving. My best versions happen when I just grab what’s hanging out in my fridge. That’s the magic—cooking is all about making it up as you go along sometimes!

Frequently Asked Questions

→ Can I make this casserole ahead of time?

Yep, just put it together the night before, stick it in the fridge, then bake in the morning when you’re set to eat.

→ What if my bread isn't day-old?

No biggie. Lay the slices in the oven at 200°F for about 10 minutes to dry them a bit. It’ll soak up the egg stuff way better that way.

→ Can I add different vegetables?

Totally! Toss in any veggies you dig. Just give mushrooms a quick pan fry first so they don’t make things soggy.

→ How do I know when it's done baking?

You’re good to go when the top is golden and the middle feels bouncy if you tap it. Let it chill 10 minutes before slicing it up.

→ Can I freeze this casserole?

Sure thing. Freeze it after you’ve baked it, then keep in the freezer up to two months. Just let it thaw in the fridge and warm it back up in the oven.

Effortless Breakfast Casserole

Adaptable egg and cheese bake with room for any meats or veggies you want. Prep it early and just pop it in the oven when you’re ready.

Prep Time
15 Minutes
Cook Time
50 Minutes
Total Time
65 Minutes
By: Sophia

Category: Brunch Favorites

Difficulty: Easy

Cuisine: American

Yield: 8 Servings (8 portions)

Dietary: ~

Ingredients

01 2 to 3 cups of shredded cheddar cheese.
02 6 to 10 eggs, large size.
03 Two cups of milk.
04 Six slices stale bread, cut into cubes.
05 Add salt as you like.
06 Add some pepper to suit your taste.
07 Half a cup of chopped-up broccoli (optional).
08 One cup of ham chunks or cooked sausage (optional).
09 Quarter cup of thinly sliced green onions (optional).
10 Half a cup of thinly sliced mushrooms (optional).
11 A cup of corn kernels, if you'd like (optional).
12 Three pieces of bacon, cooked and crumbled (optional).
13 One teaspoon of Herbes de Provence if you have it (optional).
14 Cumin or curry powder, about 1/4 to 1/2 teaspoon (optional).

Instructions

Step 01

Turn your oven on and set it to 350°F.

Step 02

Crack the eggs into a big bowl and beat them. Stir in cheese and milk. Afterward, toss in the bread cubes and mix until everything's absorbed.

Step 03

Mix in your favorite add-ins along with salt and pepper. If needed, break more eggs and add them to ensure everything gets covered.

Step 04

Grease a 9x13-inch casserole pan with butter and pour the mixture inside.

Step 05

Put the dish in the oven and bake for 50-60 minutes. The top should brown, and the middle should bounce back when you touch it.

Step 06

Set it aside for 10 minutes to cool down before slicing and serving.

Notes

  1. Adding more eggs creates a thicker texture.
  2. Pre-cook mushrooms to dry them out.
  3. Assemble this ahead; works great the next day.
  4. Fresh bread? Dry it at 200°F for 10 minutes.

Tools You'll Need

  • A casserole pan measuring 9x13 inches.
  • A big bowl for mixing.

Allergy Information

Please check ingredients for potential allergens and consult a health professional if in doubt.
  • Contains eggs.
  • Includes dairy products.
  • Uses wheat ingredients.

Nutrition Facts (Per Serving)

It is important to consider this information as approximate and not to use it as definitive health advice.
  • Calories: 375
  • Total Fat: 24 g
  • Total Carbohydrate: 17 g
  • Protein: 23 g