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Home » Main Dish

Crouton Egg Casserole with Spring Greens

Published: Apr 29, 2025 · Modified: Jun 22, 2025 by lisaKeys · This post may contain affiliate links · 1 Comment

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Crouton egg casserole with ramps and asparagus.

Remember that bag of kaiser rolls you purchased from the warehouse store last week? Ate a few, but now not fresh enough for a sandwich? Trust me. They still hold so much potential. Instead of tossing them give them a second act. Cubed and lightly toasted, these stale roll pieces become the sturdy, flavorful foundation for a crouton egg casserole soaking up a creamy egg mixture and providing a delightful textural contrast with ham, fresh picked asparagus and the springtime whisper of ramps.

Morabito kaiser rolls packaging.
1 roll makes 3 cups of croutons.
Bread cubes.
½-inch cubes
Kaiser roll croutons.
Toast them to dry them out, if needed.

This amazing recipe is the perfect dish for a hearty breakfast or an elegant holiday season brunch. It's comfort food at its best. While we celebrate the humble crouton in this simple egg dish, the beauty of this recipe lies in its adaptability. While I'm suggesting the winning combination of salty ham, tender asparagus, and the subtle garlicky punch of ramps (because, oh, how I adore ramps!), feel free to swap in your favorite vegetables and leftover proteins. This crouton egg casserole is your blank canvas for culinary creativity.

How to make an egg casserole with croutons

Crouton and cheese casserole layers.
Spread croutons over bottom of the baking dish. Drizzle with butter and sprinkle with cheese.
Pouring egg mixture on casserole layers.
Layer on ham and sliced ramps. Whisk milk, sour cream, eggs and seasoning; pour over top.
Crouton egg casserole ready to bake.
Arrange asparagus on top and sprinkle with parmesan. Bake for 40 minutes at 350°F.

Serving Suggestions

This hearty crouton egg casserole is delicious on its own, but you can also serve it with:

  • Fresh fruit salad
  • Yogurt and granola
  • A side of crispy bacon or sausage
  • A sprinkle of fresh herbs
A serving of crouton egg casserole.

This Crouton Egg Casserole is more than just a meal; it's an experience. It's the satisfaction of using what you have, the joy of creating something delicious with minimal fuss, and the comfort of sharing a warm, hearty dish with loved ones. Much like this crustless ham and cheese quiche, it's the essence of a relaxed weekend morning, captured in a single baking dish. So, embrace those slightly stale bread ends, raid your fridge for tasty additions, and let's create some cozy kitchen magic together.

Crouton egg casserole with ramps and asparagus.

Crouton Egg Casserole with Spring Greens

Lisa Keys
This easy crouton egg casserole recipe comes together quickly, making it perfect for busy mornings or even a make-ahead option for a relaxed gathering. 
5 from 1 vote
Print Recipe Pin Recipe
Prep Time 15 minutes mins
Cook Time 40 minutes mins
Total Time 55 minutes mins
Course Breakfast, brunch, main
Cuisine American
Servings 8 servings
Calories 430 kcal

Equipment

  • 1 baking dish 13x9-inch

Ingredients
  

  • 6 cups croutons
  • ¼ cup melted butter
  • 2 cups shredded cheese smoked provolone cheese or any melting cheese
  • ½ cup diced cooked ham
  • 12 ramps thinly sliced
  • 6 large eggs
  • 1 ½ cups milk
  • 1 cup sour cream
  • 1 teaspoon Kosher salt
  • ½ teaspoon ground black pepper
  • 6 to 8 blanched asparagus spears
  • 1 tablespoon grated parmesan cheese

Instructions
 

  • Heat oven to 325°F. Spray a 9x12-inch baking dish with non-stick vegetable spray.
  • Spread croutons over the bottom of the dish in a single layer.
  • Drizzle melted butter evenly over croutons.
  • Layer on cheese, ham and ramps.
  • In a large bowl, whisk eggs, milk, sour cream, salt and pepper until smooth. Pour egg mixture evenly over layers in baking dish.
  • Top with asparagus spears.
  • Sprinkle with parmesan cheese.
  • Bake 40 minutes or until top is golden brown, puffed and set.

Notes

2 kaiser rolls sliced into ½-inch cubes will yield about 6 cups of croutons.
If bread cubes are soft and springy then toast them for 5 minutes in a 350°F oven.
Yes, this can be made ahead. Cover unbaked casserole with aluminum foil and refrigerate overnight. It will take a bit longer to bake.
Keyword bread cubes, comfort food, custard, frugal meal, ham, kaiser rolls, leftovers, quick and easy, ramps, stale bread
Can I use fresh bread instead of day-old bread?

While day-old bread works best for absorbing the egg mixture without becoming mushy, you can use fresh bread. Just be sure to toast it thoroughly in the oven until it's nice and dry before assembling the casserole.

What other vegetables can I add?

Broccoli florets, chopped bell peppers, sautéed mushrooms, spinach all work wonderfully. Just ensure any denser vegetables like broccoli or bell peppers are lightly cooked beforehand. Frozen vegetables should be thawed and drained well.

Can I substitute the ham for another protein?

Absolutely! Cooked bacon, sausage, shredded chicken would be delicious additions. Omit the meat to make it vegetarian.

I can't find ramps. What can I use instead?

If ramps aren't available, you can substitute with a combination of thinly sliced green onions and a small clove of grated garlic for a similar flavor profile.

Can I make this casserole ahead of time? 

While this recipe is best enjoyed fresh, you can assemble the casserole (without baking) and store it covered in the refrigerator for up to 24 hours. Add about 10 to the baking time if baking from cold.

What kind of cheese should I use?

Any melting cheese like cheddar, Gruyere, pepper Jack are great choices. Feel free to use your favorite or a combination of cheeses! If making it vegetarian try crumbling in some feta for a bit of saltiness.

How many cups of croutons does 1 kaiser roll make?

2 ½ to 3 cups of ½-inch bread cubes.

Next time you need an egg breakfast casserole that only takes minutes of preparation give this easy brunch recipe a try. Your taste buds will thank you and so will I if you take the time to comment.

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Comments

  1. lisaKeys says

    June 22, 2025 at 12:02 pm

    5 stars
    Great way to use up stale bread and nature's bounty.

    Reply

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Lisa Keys is an award winning home cook.

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