Skillet Ham and Cheese Croissant Breakfast Casserole Recipe

This Ham and Cheese Croissant Breakfast Casserole baked in a cast iron skillet is rich, cheesy, and simple to make. It combines eggs, savory ham, melted cheddar, and buttery croissants that crisp up at the edges while staying tender and custardy in the center. With just a handful of ingredients and one pan, it’s an ideal option for busy mornings, relaxed weekend brunches, or feeding a crowd.

If you enjoy skillet breakfasts, this recipe fits perfectly into a lineup of easy, comforting morning dishes made in a cast iron pan.

Skillet Breakfast Casserole

This croissant-based baked casserole is similar in spirit to other skillet breakfast bakes like baked French toast casseroles, but the croissants lend a rich, flaky texture that takes this dish to the next level. Baking it in a cast iron skillet creates a crisp, golden edge that contrasts beautifully with the soft, custard-like interior.

Reasons to Love This Breakfast Recipe

Ham and Cheese Breakfast Casserole is a dependable crowd-pleaser for these reasons:

1. Crispy edges, soft center – Cast iron gives a crunchy, browned rim while keeping the center tender and custardy.
2. One-pan convenience – Mix, assemble, bake, and serve from a single skillet for minimal cleanup.
3. Feeds a crowd – This recipe yields about 8 servings, making it great for family breakfasts or brunch gatherings.
4. Even heat retention – Cast iron holds and distributes heat so the casserole cooks evenly.
5. Rustic presentation – Serve directly from the skillet for a warm, farmhouse-style look.

Recommended Equipment

Mixing bowls of various sizes for whisking and combining ingredients, and a 12-inch cast iron skillet for baking and serving. A sturdy whisk and a spatula or spoon help press the croissant pieces into the custard.

Why Bake in a Cast Iron Skillet?

Cast iron radiates and retains heat exceptionally well, which promotes even browning and a beautifully crisp outer crust. The seasoned surface also helps the casserole release cleanly, making serving and cleanup easier. For baked breakfasts that benefit from a golden edge—like this croissant casserole—the skillet is ideal.

What You’ll Need

• Butter croissants – 6 large croissants, torn into pieces. Day-old croissants work well because they absorb the custard without becoming soggy.
• Eggs – 6 large eggs to form the custard base.
• Milk – 1 cup whole milk (or your preferred milk; whole milk produces a richer custard).
• Dijon mustard – 1 teaspoon to brighten the flavor.
• Ham – 2 cups, cubed. Use diced cooked ham for best texture and flavor.
• Cheese – 1 1/2 cups shredded sharp cheddar (or another melting cheese you prefer).
• Salt and pepper – to taste.

How to Make Ham and Cheese Croissant Breakfast Casserole in a Skillet

Prepare the custard

• In a large bowl, whisk together the eggs, milk, dijon mustard, salt, and black pepper until smooth and combined.
• Stir in the cubed ham and shredded cheddar until evenly distributed.

Prepare the croissants and skillet

• Grease a 12-inch cast iron skillet lightly with butter or oil if needed.
• Tear the croissants into thirds and arrange them in the bottom of the skillet; overlapping is fine.

Assemble and bake

• Pour the egg, ham, and cheese mixture over the croissant pieces. Press gently with a fork or spoon so the croissant pieces soak up the custard evenly.
• Let the skillet rest while the oven preheats so the croissants absorb the mixture for a few minutes.
• Bake at 350ºF for 25–30 minutes, until the center is set, the edges are golden and crisp, and the cheese has melted.
• Allow the casserole to rest for at least 5 minutes before slicing and serving so it firms up slightly.

Can I Use a 9×13 Inch Baking Dish?

Yes. If you don’t have a 12-inch skillet, a 9×13-inch baking dish will work. Grease the dish, layer the torn croissants, pour the custard over them, and bake using the same temperature and time, checking for a set center and golden edges.

Can I Make This Ahead?

You can assemble the casserole the night before and refrigerate it. Keep in mind that croissants left to soak overnight may be softer and less crisp when baked; they will still be flavorful and satisfying. Bake straight from the fridge, adding a few extra minutes if needed until set.

Storage and Leftovers

Store leftovers in an airtight container in the refrigerator for 2–3 days. Reheat single portions in the microwave or air fryer until warmed through. Re-crisp the edges briefly under a broiler or in a hot skillet if desired.

Ingredients

• 6 large croissants
• 6 large eggs
• 1 cup whole milk
• 1 teaspoon dijon mustard
• 2 cups ham, cubed
• 1 1/2 cups sharp cheddar cheese, shredded
• Salt and pepper, to taste

Instructions

1. Preheat oven to 350ºF. Grease a 12-inch cast iron skillet if needed.
2. In a large bowl, whisk eggs, milk, dijon mustard, salt, and pepper until combined. Stir in ham and cheddar.
3. Tear croissants into thirds and place into the prepared skillet. Pour the custard mixture evenly over the croissants and press pieces down so they absorb the liquid. Let rest a few minutes.
4. Bake for 25–30 minutes until edges are golden and the center is set. Remove from oven and rest 5 minutes before serving.

Nutrition (Estimate)

Per serving: approximately 411 kcal, 22 g carbohydrates, 21 g protein, 26 g fat. Values are estimates based on listed ingredients.

How to Serve

Serve warm directly from the skillet for a rustic presentation. It pairs nicely with a simple fruit salad, fresh juice, or coffee. For a special brunch, offer fruit, muffins, or cinnamon rolls alongside the casserole.

If You Cooked This

If you try this Ham and Cheese Croissant Breakfast Casserole, consider noting any adjustments you made (different cheese, added veggies, or alternate meats) to customize the recipe to your taste.