Ham & Cheese Croissant Bake with Caramelized Mushrooms

Prep Time 10 minutes
Cook Time 25 minutes
Total Time 35 minutes
Servings 8


  • Klarbrunn Lemon Sparkling Water for serving
  • 6 Croissants Plain
  • 1 tbsp. Olive Oil
  • 8 oz. Mushrooms sliced
  • 2 cloves Garlic minced
  • 1 cup Whole Milk
  • 1 tbsp. Italian Herb Seasoning
  • 2 Large Eggs
  • 2-3 tbsp. Dijon Mustard
  • 6 slices Swiss cheese
  • 6 slices Deli Ham
  • 1 cup Shredded Swiss or Mozzarella Cheese Optional
  • Prosciutto Optional


  • Preheat oven to 400F. Lightly grease a large casserole dish with butter or olive oil.
  • Sauté the mushrooms and garlic with the olive oil over medium high heat for 4-5 minutes, until tender. Set aside. 
  • Slice each croissant in half. Layer with a generous spread of dijon mustard, a slice of Swiss cheese, and a slice of deli ham. Add the top of the croissant back, as if you were making a sandwich. Slice the croissant sandwich in half. Repeat with remaining croissants. 
  • Add the croissant halves into the prepared casserole dish in a single layer. 
  • In a large bowl, whisk the milk, eggs, and Italian seasoning together. Evenly pour over the croissants. 
  • Distribute the mushrooms over the croissants.
  • (Optional: Add the shredded cheese evenly over the croissants. Add the prosciutto in small bundles in between the croissants.)
  • Cover the dish with foil to bake for 20 minutes. Bake uncovered for 8-10 minutes. Enjoy warm with Klarbrunn Lemon Sparkling Water for a refreshing complimentary drink!