Ham Swiss Croissant Bake (Printable)

Buttery croissants, smoky ham, and Swiss cheese baked in a rich custard for a savory meal.

# Ingredient List:

→ Bread & Dairy

01 - 4 large butter croissants (preferably day-old), cut into 2-inch pieces
02 - 2 cups shredded Swiss cheese
03 - 1.5 cups whole milk
04 - 0.5 cup heavy cream

→ Meats

05 - 8 ounces cooked ham, diced

→ Vegetables & Aromatics

06 - 4 green onions, thinly sliced

→ Eggs & Seasoning

07 - 4 large eggs
08 - 0.5 teaspoon Dijon mustard
09 - 0.5 teaspoon freshly ground black pepper
10 - 0.25 teaspoon salt
11 - Pinch of ground nutmeg

→ For Topping

12 - 2 tablespoons grated Parmesan cheese (optional)

# Steps:

01 - Preheat oven to 350°F. Grease a 9x13-inch baking dish with butter or nonstick spray.
02 - Layer half of the croissant pieces evenly in the baking dish. Top with half of the ham, half of the Swiss cheese, and half of the green onions. Repeat with remaining croissants, ham, cheese, and green onions.
03 - In a large bowl, whisk together the eggs, milk, cream, Dijon mustard, salt, pepper, and nutmeg until well combined.
04 - Pour the egg mixture evenly over the layered croissants and ham in the baking dish, pressing down gently to soak.
05 - Sprinkle with Parmesan cheese if desired.
06 - Bake uncovered for 30-35 minutes, or until the top is golden and the custard is set in the center.
07 - Allow to cool for 5-10 minutes before serving.

# Expert Advice:

01 -
  • It transforms humble croissants into a showstopper main dish that tastes far fancier than the minimal effort required.
  • You can assemble everything in under twenty minutes, then let the oven do all the heavy lifting while you pour a drink and relax.
  • The creamy custard soaks into every buttery layer, creating pockets of melted Swiss cheese and smoky ham that feel indulgent but not heavy.
02 -
  • Don't skip the resting time after baking, because cutting into it immediately while it's still steaming hot will result in a soupy mess, even though the center looked set.
  • Using day-old croissants is genuinely essential—I learned this the hard way when I used fresh ones and ended up with something more like French toast soup.
03 -
  • Cut your croissants into uniform pieces so they cook evenly and soak up custard at the same rate, which prevents some bites from being soggy while others stay dry.
  • Whisk the custard base thoroughly so the mustard and spices distribute evenly rather than settling to the bottom, which ensures every forkful tastes intentional.
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