Easy Overnight Asparagus Mushroom Breakfast Casserole

If you’re looking for a delicious breakfast dish that is easy to prepare and perfect for entertaining, then look no further than this asparagus mushroom breakfast casserole. This dish is not only healthy and delicious, but it can also be made the night before, which makes it perfect for busy mornings.

Asparagus Mushroom Breakfast Introduction

Breakfast is the most important meal of the day, and this asparagus mushroom breakfast casserole is the perfect way to start your day. This dish is easy to prepare, and it can be made the night before, which makes it perfect for busy mornings. With the perfect combination of asparagus, mushrooms, eggs, cheese, and bread, this casserole is a great way to get all of the nutrients you need to start your day off right.


Here are the ingredients you’ll need to make this delicious asparagus mushroom breakfast casserole:

  • 1 pound asparagus, trimmed and cut into 1-inch pieces
  • 8 ounces mushrooms, sliced
  • 6 large eggs
  • 1 1/2 cups milk
  • 1/2 teaspoon salt
  • 1/4 teaspoon black pepper
  • 4 cups bread, cubed
  • 1 1/2 cups shredded cheddar cheese


  • Preheat oven to 375°F (190°C).
  • Grease a 9×13 inch baking dish with cooking spray.
  • In a large skillet, heat the olive oil over medium heat.
  • Add the asparagus, mushrooms, and onion and cook until tender, about 10 minutes.
  • In a large bowl, whisk together the eggs, milk, Dijon mustard, salt, and black pepper.
  • Add the bread cubes, cheese, and cooked vegetables and mix well.
  • Pour the mixture into the prepared baking dish.
  • Cover with aluminum foil and refrigerate overnight.

Making the casserole

  • Preheat oven to 375°F (190°C).
  • Remove the casserole from the refrigerator and let it sit at room temperature for 30 minutes.
  • Bake the casserole, covered with aluminum foil, for 40 minutes.
  • Remove the foil and bake for an additional 10-15 minutes or until the top is golden brown and the casserole is set.
  • Let the casserole cool for a few minutes before slicing and serving.

Tips and Tricks for Making the Perfect Asparagus Mushroom Breakfast Casserole

  • Choose Fresh Ingredients: The key to making a delicious asparagus mushroom breakfast casserole is to use fresh ingredients. Fresh asparagus and mushrooms will have more flavor and a better texture than frozen or canned varieties. Be sure to choose firm, bright green asparagus with tightly closed tips, and fresh, firm mushrooms.
  • Prep Your Ingredients: Before you start cooking, make sure you’ve prepped all your ingredients. Clean and chop your asparagus and mushrooms, and grate your cheese. This will make the cooking process go smoothly and ensure that everything is ready to go when you need it.
  • Add Some Spice: For an extra kick of flavor, consider adding some spices to your casserole. Garlic powder, onion powder, paprika, or red pepper flakes can all add a delicious depth of flavor to the dish.
  • Use the Right Baking Dish: When making a casserole, it’s important to use the right baking dish. A 9×13-inch baking dish works well for most casseroles, including an asparagus mushroom breakfast casserole.
  • Mix It Up: Don’t be afraid to experiment with different ingredients in your asparagus mushroom breakfast casserole. Try adding cooked bacon or sausage for some extra protein, or switch up the cheese for a different flavor.
  • Don’t Overcook: One of the biggest mistakes people make when making a casserole is overcooking it. To prevent this, keep an eye on your casserole while it’s in the oven and remove it when the eggs are set but still slightly jiggly in the center.
  • Let it Rest: After you remove your casserole from the oven, let it rest for a few minutes before serving. This will allow the eggs to set fully and make it easier to cut into servings.

Nutritional information

This asparagus mushroom breakfast casserole is not only delicious, but it is also healthy. Here is the nutritional information for one serving (based on 8 servings):

  • Calories: 250
  • Fat: 15g
  • Carbohydrates: 14g
  • Protein: 15g
  • Sodium: 460mg


There are many ways to make this asparagus mushroom breakfast casserole your own. Here are a few ideas:

  • Add cooked bacon or sausage for a meatier version.
  • Swap out the asparagus and mushrooms for other vegetables such as broccoli, spinach, or peppers.
  • Use different types of cheese such as feta, goat cheese, or Swiss cheese.

Health Benefits

Not only is this breakfast casserole delicious, but it’s also packed with nutrients. Asparagus is a great source of fiber, vitamins A and C, and folate, while mushrooms are loaded with antioxidants and vitamin D. Eggs are also a good source of protein and healthy fats, making this casserole a great way to start your day on a healthy note.


In conclusion, this easy overnight asparagus mushroom breakfast casserole is a delicious and hearty way to start your day. With just a few simple ingredients and a little bit of prep time, you can have a nutritious and satisfying breakfast that will keep you fueled all morning long. So why not give it a try and switch up your breakfast routine?

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