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Ham and Cheese Croissant Bake

A decadent breakfast or brunch casserole featuring flaky croissants layered with ham and Swiss cheese, baked in a rich egg custard.
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Prep Time 15 minutes
Cook Time 40 minutes
Total Time 55 minutes
Servings: 6 servings
Course: Breakfast, Brunch, Main Course
Cuisine: American, French Inspired
Ingredients Equipment Method Notes

Ingredients
  

Casserole Base
  • 6 large croissants slightly stale, sliced horizontally
  • 0.5 pound deli ham thinly sliced
  • 0.5 pound Swiss cheese thinly sliced (the gooey star)
Egg Custard
  • 4 large eggs
  • 2 cups whole milk or half-and-half
  • 1 tbsp Dijon mustard
  • 0.5 tsp salt
  • 0.25 tsp black pepper
Optional Poppy Seed Glaze
  • 0.25 cup unsalted butter melted (the gooey topping)
  • 1 tbsp poppy seeds
  • 1 tsp Dijon mustard
  • 0.5 tsp Worcestershire sauce optional

Equipment

  • 9x13 inch baking dish
  • Mixing bowl
  • Whisk

Method
 

  1. Grease a 9x13 dish. Arrange bottom halves of croissants in the dish.
  2. Layer ham evenly over croissants, then layer Swiss cheese over the ham.
  3. Place croissant tops over the cheese.
  4. Whisk eggs, milk, Dijon mustard, salt, and pepper. Pour evenly over croissants.
  5. Cover and refrigerate for at least 30 minutes or overnight.
  6. Preheat oven to 350°F (175°C). Whisk optional glaze ingredients (melted butter, poppy seeds, mustard, Worcestershire). Brush over croissants.
  7. Bake uncovered for 30-40 minutes until golden, bubbly, and the **gooey cheese** is melted and custard is set.
  8. Let rest 5-10 minutes before slicing and serving warm.

Notes

Using slightly stale croissants helps them absorb the custard better. Chilling overnight enhances flavor and texture. Ensure cheese is fully melted for the best **thick gooey** result.