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Ham and Cheese Croissant Breakfast Casserole for Cozy Mornings

Published: Aug 6, 2025 by Sierra Lane · This post may contain affiliate links · Leave a Comment

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As I stood at the kitchen counter, the warm aroma of buttery croissants filled the air, instantly transporting me to a cozy French café. That's when I knew it was time to whip up my favorite Ham and Cheese Croissant Breakfast Casserole. This elegant dish perfectly marries flaky, golden croissants with savory ham and rich Swiss cheese, creating a comforting breakfast that’s more than just a meal; it’s a delightful experience. One of the best parts? It's wonderfully customizable to accommodate various tastes and dietary preferences, whether you prefer a vegetarian twist or a different cheese blend. Plus, it’s a breeze to prepare, making it an ideal choice for busy mornings or leisurely brunches with family and friends. Are you ready to elevate your breakfast game?

Why Is This Casserole a Must-Try?

Versatile and adaptable, this Ham and Cheese Croissant Breakfast Casserole can be tailored to fit any palate — from hearty meat-lovers to those seeking light vegetarian options. Effortless preparation means you’ll spend less time in the kitchen and more time enjoying the company of loved ones. Crowd-pleasing flavors of buttery croissants and melted cheese create a dish that will impress at any brunch gathering. And with creative variations available, such as swapping croissants for brioche or trying different cheeses, every batch can be a new adventure. Don’t forget to serve it alongside fresh fruit or a light salad, much like a delightful pairing of Breakfast Stuffed Peppers on your table!

Ham and Cheese Croissant Breakfast Casserole Ingredients

• Get ready to gather everything you need for this deliciously customizable dish!

For the Casserole Base

  • 6 large buttery croissants – Provides rich flavor and flaky texture. Substitution Note: Brioche or sourdough can be used for a different taste.
  • 1 cup diced ham – Adds savory depth. Substitution Note: Cooked bacon or turkey works well as alternatives.
  • 1 cup shredded Swiss cheese – Melts beautifully and enhances creaminess. Substitution Note: Try mozzarella or pepper jack for a twist.
  • ½ cup grated Parmesan cheese – Offers a crispy topping and additional flavor. No substitutions recommended for texture.

For the Custard Mixture

  • 6 large eggs – Binds the ingredients and adds protein. No substitutions recommended.
  • 2 cups milk – Contributes moisture and creaminess. Substitution Note: Almond milk can be used for a dairy-free option.
  • 1 teaspoon dried thyme – Provides herbal aroma and flavor. Substitution Note: Fresh herbs can enhance freshness.
  • 1 teaspoon garlic powder – Adds depth of flavor. Substitution Note: Fresh minced garlic can be used for a stronger taste.
  • Salt and pepper to taste – Enhances overall flavor. Adjust to preference.

For Garnish

  • Fresh chives, chopped – Adds color and freshness. Optional but recommended.

Dive into these ingredients, and watch how your kitchen transforms into a haven of delicious aromas and delightful tastes with this Ham and Cheese Croissant Breakfast Casserole!

Step‑by‑Step Instructions for Ham and Cheese Croissant Breakfast Casserole

Step 1: Preheat and Prepare
Begin by preheating your oven to 350°F (175°C) and greasing a 9x13 inch baking dish with butter or cooking spray to prevent sticking. This step is crucial as it sets the stage for your Ham and Cheese Croissant Breakfast Casserole to bake evenly. You want to ensure a golden and crispy top once it’s done!

Step 2: Assemble the Croissant Base
Next, cut the buttery croissants into quarters and arrange them evenly at the bottom of the prepared baking dish. The flaky layers should be close together, allowing the croissants to soak up all the delicious custard. As you do this, envision how each bite will be filled with that scrumptious texture!

Step 3: Add Ham and Cheese
Sprinkle the diced ham generously over the croissant pieces, ensuring each piece gets its savory share. Then, follow this with an even layer of shredded Swiss cheese, allowing the melty goodness to envelop the croissants. This combination is what makes your Ham and Cheese Croissant Breakfast Casserole truly irresistible!

Step 4: Whisk the Custard Mixture
In a medium bowl, whisk together the eggs, milk, dried thyme, garlic powder, salt, and pepper until thoroughly combined. You’re looking for a smooth, creamy consistency that will blanket your croissant and cheese layers. This mixture binds the ingredients together and creates that delightful custardy texture.

Step 5: Pour and Soak
Pour the egg mixture evenly over the croissant and ham layers, making sure every piece is soaked thoroughly. This step is vital as it allows all the flavors to meld beautifully. For added moisture, gently press down the croissant edges to absorb the custard.

Step 6: Top with Parmesan
Sprinkle the grated Parmesan cheese over the casserole's top, creating a crispy, flavorful crust when baked. This adds not only texture but also a delightful flavor that complements the richness of the Swiss cheese. Your Ham and Cheese Croissant Breakfast Casserole is coming together beautifully!

Step 7: Bake Covered
Cover the baking dish with foil and bake in the preheated oven for 30 minutes to allow the casserole to cook evenly and set. This initial covered phase helps steam the ingredients while trapping moisture, ensuring a fluffy interior.

Step 8: Finish Baking Uncovered
After 30 minutes, remove the foil and allow your casserole to bake for an additional 15-20 minutes, or until the top is a gorgeous golden brown and slightly crispy. This step creates that beautiful contrast in texture, making each serving of your Ham and Cheese Croissant Breakfast Casserole extra special!

Step 9: Cool and Garnish
Once out of the oven, let the casserole cool for about 5 minutes. This cooling time helps with slicing and serving. Before you dig in, garnish your dish with freshly chopped chives for a pop of color and a hint of freshness. Now it’s time to savor the delightful aromas and flavors!

Make Ahead Options

These Ham and Cheese Croissant Breakfast Casserole options are perfect for busy mornings! You can assemble the entire casserole up to 24 hours in advance; simply follow the recipe through the pouring of the custard mixture. After that, cover it tightly with foil and refrigerate to allow the croissants to soak up the flavors. This ensures that the casserole remains just as delicious when baked the next day. When you're ready to serve, simply remove it from the fridge and bake according to the directions, adding a few extra minutes if needed. You'll enjoy a warm, comforting dish that feels fresh, saving you time while still delighting your family!

Ham and Cheese Croissant Breakfast Casserole Variations

Feel free to get creative and customize this dish to cater to your unique flavor preferences or dietary needs!

  • Vegetarian Substitute: Replace ham with sautéed mushrooms or bell peppers for a hearty, veggie-packed version. The umami flavor from the mushrooms makes this twist especially satisfying!

  • Gluten-Free Option: Use gluten-free croissants or bread to make this casserole suitable for those with gluten sensitivities. Your breakfast can still be delicious and enjoyable without compromising taste!

  • Cheese Variety: Swap Swiss cheese for a mix of cheddar, mozzarella, or goat cheese to introduce a spectrum of flavors. Each cheese offers a unique spin, making every breakfast an adventure!

  • Bacon Lovers: For a smoky flavor, substitute diced ham with crispy crumbled bacon, or even a combination of both for a savory delight. The added crunch elevates this dish to new heights!

  • Spice It Up: Add a dash of cayenne pepper or hot sauce to the egg mixture for a spicy kick. This simple addition can transform boring breakfasts into delightful culinary experiences!

  • Mini Servings: Pour the mixture into muffin tins to create individual breakfast cups for easy serving at brunch. These handy portions make them great for gatherings or meal prep!

  • Herb Infusion: Experiment by using fresh herbs like basil or parsley instead of dried thyme for a refreshing twist. Fresh herbs can brighten the flavor profile and make your casserole sing!

Why not serve your Ham and Cheese Croissant Breakfast Casserole alongside a refreshing side of fruit, much like a delightful pairing seen in Overnight Cinnamon Casserole? It’s the perfect balance for a warm and scrumptious brunch!

What to Serve with Ham and Cheese Croissant Breakfast Casserole

Start your day off right by complementing this decadent dish with delightful sides that elevate your brunch experience.

  • Fresh Fruit Salad: A medley of seasonal fruits adds a refreshing contrast to the rich casserole, balancing flavors beautifully. The juicy sweetness of berries or citrus cuts through the creaminess, making every bite feel vibrant and light.

  • Mixed Greens Salad: Tossed with a tangy vinaigrette, this salad introduces a crisp and zesty texture that enhances the savory flavors. Adding nuts or cheese can bring extra crunch and creaminess to your plate for a well-rounded meal.

  • Crispy Bacon or Sausages: These savory options provide a hearty, protein-packed side to pair with the casserole’s creamy richness. The smoky flavors of bacon or the spiced goodness of sausage will have everyone reaching for another slice.

  • Savory Breakfast Potatoes: Golden, crispy potatoes seasoned with herbs deliver satisfying crunch and warm comfort. They can be seasoned to your liking, offering a complementary flavor profile that rounds out your breakfast spread.

  • Hot Buttered Toast: Nothing beats warm, crusty bread slathered with butter. Toast serves as a classic accompaniment, perfect for soaking up any leftover custard from your casserole. It’s an easy yet luxurious addition to your brunch table.

  • Orange Juice or Coffee: Kickstart your morning with a refreshing glass of tangy orange juice or a steaming cup of coffee. These beverages not only enhance the breakfast theme, but their flavors beautifully complement the casserole's richness.

  • Sweet Pastries: Add a touch of indulgence with pastries like croissants or Danish pastries. Their flaky textures add variety, and their sweetness can satisfy that morning craving for something delightful, creating a charming spread.

Expert Tips for Ham and Cheese Croissant Breakfast Casserole

  • Soak Well: Ensure the croissants are thoroughly soaked in the egg mixture; pressing them down will help absorb the flavors for a fluffy texture.

  • Oven Watch: Keep an eye on the casserole near the end of baking; oven temperatures can vary, and you don’t want it to burn.

  • Make Ahead: If preparing ahead, assemble the casserole the night before and refrigerate it but bake it fresh in the morning for the best results.

  • Cheese Options: Experiment with different cheeses like mozzarella or pepper jack in your Ham and Cheese Croissant Breakfast Casserole to add a unique twist.

  • Garlic Boost: For a stronger garlic flavor, swap garlic powder for fresh minced garlic; it enhances depth and richness beautifully.

How to Store and Freeze Ham and Cheese Croissant Breakfast Casserole

Fridge: Store any leftovers in an airtight container in the refrigerator for up to 3-4 days, ensuring the casserole stays fresh and delicious for your next breakfast.

Freezer: Cut the casserole into individual portions, wrap each in plastic wrap, and place them in a freezer-safe bag. It will keep for up to 3 months—perfect for busy mornings!

Reheating: Thaw overnight in the fridge before reheating. Reheat in the oven at 350°F (175°C) for about 15-20 minutes, or until heated through, for a delightful breakfast experience.

Make Ahead: You can assemble your Ham and Cheese Croissant Breakfast Casserole the night before, cover it, and refrigerate without baking. This way, you can pop it in the oven the next morning for fresh, warm enjoyment!

Ham and Cheese Croissant Breakfast Casserole Recipe FAQs

How do I choose the best croissants for this casserole?
Absolutely! For the best Ham and Cheese Croissant Breakfast Casserole, look for croissants that are fresh and buttery. You want them to feel light and flaky without any dark spots all over. If they’re a day or two old, that’s okay too, as they’ll absorb the custard mixture nicely. Brioche or sourdough also work great as alternatives, offering a different flavor profile.

What’s the best way to store leftovers?
Very simple! Store any leftovers of your casserole in an airtight container in the refrigerator for up to 3-4 days. Make sure it's sealed well to maintain freshness! When you’re ready to enjoy it again, just reheat in the oven for a warm, comforting meal reminiscent of fresh-baked goodness.

Can I freeze the Ham and Cheese Croissant Breakfast Casserole?
Yes, you can! To freeze, cut the casserole into individual portions, wrap each piece tightly in plastic wrap, and place them in a freezer bag. It will stay fresh in your freezer for up to 3 months. When you’re ready for a quick meal, simply thaw in the fridge overnight, and reheat in the oven at 350°F (175°C) for about 15-20 minutes.

What if my casserole is too soggy after baking?
If your Ham and Cheese Croissant Breakfast Casserole turns out a bit soggy, it might be due to excessive soaking of the croissants or too much liquid in the mixture. To prevent this, ensure the croissants are well-soaked but not dripping. If it happens, you can try baking it a bit longer uncovered to allow excess moisture to evaporate, resulting in a fluffier texture.

Are there any dietary considerations I should keep in mind?
Certainly! While this casserole includes ham and cheese, it can easily be adapted to fit different dietary needs. For a vegetarian option, swap the ham for sautéed mushrooms or bell peppers. If you have dairy allergies, using almond milk and a dairy-free cheese will work well. Always adjust ingredients to suit your specific dietary preferences and enjoy sorting through the delightful variations!

Can I prepare this casserole the night before?
Absolutely! You can assemble the Ham and Cheese Croissant Breakfast Casserole the night before. Just ensure you cover it tightly and refrigerate without baking it right away. When you wake up, simply pop it in the oven straight from the fridge for a fresh and easy breakfast that’s perfect for busy mornings!

Ham and Cheese Croissant Breakfast Casserole

Ham and Cheese Croissant Breakfast Casserole for Cozy Mornings

This Ham and Cheese Croissant Breakfast Casserole is a cozy and customizable dish perfect for delightful mornings.
Print Recipe Pin Recipe
Prep Time 20 minutes mins
Cook Time 45 minutes mins
Cooling Time 5 minutes mins
Total Time 1 hour hr 10 minutes mins
Course Breakfast
Cuisine French
Servings 8 slices
Calories 350 kcal

Equipment

  • 9×13-inch baking dish
  • whisk
  • mixing bowl

Ingredients
  

For the Casserole Base

  • 6 large buttery croissants Substitution Note: Brioche or sourdough can be used for a different taste.
  • 1 cup diced ham Substitution Note: Cooked bacon or turkey works well as alternatives.
  • 1 cup shredded Swiss cheese Substitution Note: Try mozzarella or pepper jack for a twist.
  • ½ cup grated Parmesan cheese No substitutions recommended for texture.

For the Custard Mixture

  • 6 large eggs No substitutions recommended.
  • 2 cups milk Substitution Note: Almond milk can be used for a dairy-free option.
  • 1 teaspoon dried thyme Substitution Note: Fresh herbs can enhance freshness.
  • 1 teaspoon garlic powder Substitution Note: Fresh minced garlic can be used for a stronger taste.
  • Salt and pepper Adjust to preference.

For Garnish

  • Fresh chives, chopped Optional but recommended.

Instructions
 

Step‑by‑Step Instructions

  • Preheat your oven to 350°F (175°C) and grease a 9x13 inch baking dish with butter or cooking spray.
  • Cut the buttery croissants into quarters and arrange them evenly at the bottom of the prepared baking dish.
  • Sprinkle the diced ham generously over the croissant pieces, followed by an even layer of shredded Swiss cheese.
  • In a medium bowl, whisk together the eggs, milk, dried thyme, garlic powder, salt, and pepper until thoroughly combined.
  • Pour the egg mixture evenly over the croissant and ham layers, pressing down to absorb the custard.
  • Sprinkle the grated Parmesan cheese over the casserole's top.
  • Cover the baking dish with foil and bake for 30 minutes.
  • Remove the foil and bake for an additional 15-20 minutes, or until the top is golden brown.
  • Let the casserole cool for about 5 minutes and garnish with freshly chopped chives.

Notes

This dish is wonderfully customizable to accommodate various tastes and dietary preferences. For a lighter option, serve accompanied by fresh fruit or a light salad.

Nutrition

Serving: 1sliceCalories: 350kcalCarbohydrates: 25gProtein: 18gFat: 20gSaturated Fat: 10gPolyunsaturated Fat: 1gMonounsaturated Fat: 8gCholesterol: 200mgSodium: 800mgPotassium: 300mgFiber: 1gSugar: 3gVitamin A: 600IUVitamin C: 2mgCalcium: 400mgIron: 2mg
Keyword Breakfast Casserole, Brunch, cozy mornings, easy breakfast, egg casserole, Ham and Cheese Croissant Breakfast Casserole
Tried this recipe?Let us know how it was!

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About Sierra Lane

Season-obsessed cook sharing quick, produce-packed recipes for everyday meals—straight from my farmers’ market basket to your table.

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