Savory Croissant Breakfast Casserole with Mushroom and Gruyère
Indulge in the comforting flavors of this Savory Croissant Breakfast Casserole filled with earthy mushrooms and rich Gruyère cheese. Perfect for brunch or special occasions, this dish combines buttery croissants with a creamy egg mixture, creating a deliciously satisfying meal that will impress your family and friends. Baked to golden perfection, it invites everyone to gather around the table and enjoy every scrumptious bite.
- Prep Time: 20 minutes
- Cook Time: 50 minutes
- Total Time: 1 hour 10 minutes
- Yield: Serves 8
- Category: Breakfast
- Method: Baking
- Cuisine: French
Ingredients
Scale
- 6 large croissants, torn into pieces
- 1 cup cremini mushrooms, sliced
- 1 cup Gruyère cheese, grated
- 4 large eggs
- 1 cup whole milk
- 1 medium yellow onion, diced
- 1 tsp fresh thyme (or ½ tsp dried thyme)
- Salt and pepper to taste
- 2 tbsp butter for sautéing
Instructions
- Preheat the oven to 350°F (175°C) and grease a 9×13 inch baking dish.
- In a skillet over medium heat, melt butter. Add diced onions and sliced mushrooms; sauté until onions are translucent.
- In a bowl, whisk together eggs, milk, thyme, salt, and pepper.
- Layer half of the torn croissants in the baking dish. Pour half of the egg mixture over them, followed by sautéed vegetables and half of the Gruyère cheese.
- Repeat layering with remaining croissants, egg mixture, and top with remaining cheese.
- Cover with foil and bake for 30 minutes. Remove foil and bake for an additional 15-20 minutes until golden brown.
Nutrition
- Serving Size: 1 slice (125g)
- Calories: 350
- Sugar: 4g
- Sodium: 540mg
- Fat: 22g
- Saturated Fat: 10g
- Unsaturated Fat: 10g
- Trans Fat: 0g
- Carbohydrates: 25g
- Fiber: 2g
- Protein: 14g
- Cholesterol: 210mg
Keywords: For a twist on flavor, substitute Gruyère cheese with cheddar or mozzarella. Add cooked bacon or spinach for extra richness. This casserole can be prepared up to 24 hours in advance; just refrigerate before baking.