Whether you’re feeding your family or hosting guests, this fluffy casserole is packed with flavor and can be customized with your favorite ingredients.
What Is a Soufflé Casserole?
A soufflé casserole is a baked egg dish that rises beautifully in the oven thanks to beaten eggs. Unlike a delicate soufflé that must be served immediately, this casserole remains delicious even after it settles slightly, making it much more forgiving for home cooks.
The base typically includes eggs, milk, cheese, and bread, along with optional vegetables, herbs, or cooked meats for extra flavor.
Ingredients
- 8 large eggs
- 2 cups whole milk
- 6 slices white or sourdough bread, cubed
- 2 cups shredded cheddar cheese
- ¼ cup grated Parmesan cheese
- 2 tablespoons melted butter
- 1 teaspoon Dijon mustard (optional)
- ½ teaspoon garlic powder
- ½ teaspoon onion powder
- Salt and black pepper to taste
- 2 tablespoons chopped fresh parsley
- Optional additions:
- 1 cup cooked ham, diced
- ½ cup cooked bacon, crumbled
- 1 cup sautéed spinach
- ½ cup mushrooms
- Diced bell peppers
Instructions
1. Prepare the Baking Dish
Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking dish with butter or nonstick cooking spray.
2. Arrange the Bread
Spread the bread cubes evenly across the prepared baking dish.
3. Add Cheese
Sprinkle the cheddar and Parmesan evenly over the bread. If using ham, bacon, or vegetables, distribute them over the cheese.
4. Mix the Egg Custard
In a large bowl, whisk together:
- Eggs
- Milk
- Melted butter
- Dijon mustard
- Garlic powder
- Onion powder
- Salt
- Pepper
Pour the mixture evenly over the bread and cheese.
5. Let It Soak
Allow the casserole to rest for 15–20 minutes so the bread absorbs the custard. For an even richer texture, cover and refrigerate overnight.
6. Bake
Bake for 45–55 minutes, or until the center is set and the top is golden brown. A knife inserted into the center should come out clean.
7. Rest Before Serving
Let the casserole rest for 5–10 minutes before slicing. Garnish with chopped parsley.
Delicious Variations
Spinach and Feta
Swap cheddar for feta cheese and add sautéed spinach for a Mediterranean-inspired version.
Ham and Swiss
Use diced ham and shredded Swiss cheese for a classic brunch favorite.
Bacon and Cheddar
Crispy bacon and sharp cheddar create a rich, savory casserole everyone enjoys.
Vegetable Garden
Add mushrooms, onions, bell peppers, tomatoes, and broccoli for a colorful vegetarian option.
Tips for the Best Soufflé Casserole
- Use day-old bread for better texture.
- Avoid overbaking to keep the casserole moist.
- Freshly grated cheese melts more smoothly than pre-shredded varieties.
- Let the casserole rest before serving so it slices neatly.
- Refrigerate leftovers in an airtight container for up to 3 days.
Serving Suggestions
This soufflé casserole pairs well with:
- Fresh fruit salad
- Mixed green salad
- Roasted potatoes
- Crispy bacon or breakfast sausage
- Toast or buttery croissants
- Fresh orange juice or coffee
Frequently Asked Questions
Can I make it ahead of time?
Yes. Assemble the casserole the night before, cover, and refrigerate. Bake it fresh the next morning.
Can I freeze it?
Yes. Bake, cool completely, then wrap tightly and freeze for up to 2 months. Thaw overnight in the refrigerator before reheating.
Why did my casserole sink?
A slight drop after baking is completely normal. Unlike a traditional soufflé, a soufflé casserole is designed to remain delicious even after settling.
Final Thoughts
A soufflé casserole offers everything you want in a comfort-food recipe—light, fluffy eggs, melted cheese, and endless opportunities for customization. Whether you serve it for a holiday brunch, weekend breakfast, or simple family dinner, it’s a satisfying dish that’s easy to prepare and sure to become a favorite. With simple ingredients and make-ahead convenience, this casserole is one you’ll return to again and again.